Sarthaks eConnect | Largest Online Education Community - Recent questions and answers in Electronics
https://www.sarthaks.com/qa/electronics
Managed by Sarthaks eConnectAnswered: An iron-cored electromagnet has a d.c. resistance of 5 ohm and when connected to a 400V, 50Hz supply takes 10A and consumes 2kW
https://www.sarthaks.com/948818/iron-cored-electromagnet-resistance-when-connected-400v-50hz-supply-takes-consumes-2kw?show=948832#a948832
<p><span style="color:#000000"><strong>Here is your solution</strong></span></p><p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=9435509666912588323" style="height:917px; width:600px"></span></p><p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=7767626952501311898" style="height:457px; width:600px"></span></p>Electronicshttps://www.sarthaks.com/948818/iron-cored-electromagnet-resistance-when-connected-400v-50hz-supply-takes-consumes-2kw?show=948832#a948832Sun, 18 Oct 2020 08:29:50 +0000Answered: The transfer function of discreat time system is
https://www.sarthaks.com/948452/the-transfer-function-of-discreat-time-system-is?show=948754#a948754
<p><span style="color:#000000">The <strong>Z-transform is </strong>used in discrete time systems to create a discrete time transfer function of the system with a set of poles and zeros. It is a formal transformation for discrete time signals (signals described in terms of their samples) to a new complex variable called z.</span></p>Electronicshttps://www.sarthaks.com/948452/the-transfer-function-of-discreat-time-system-is?show=948754#a948754Sat, 17 Oct 2020 12:12:18 +0000Answered: calculate the maximum power dissipated in the coil
https://www.sarthaks.com/947480/calculate-the-maximum-power-dissipated-in-the-coil?show=947872#a947872
<p><span style="color:#000000">N=100,A=3m<sup>2</sup>,ω=60rad/s</span></p><p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=18404395421385497472" style="height:192px; width:358px"></span></p><p></p><p></p>Electronicshttps://www.sarthaks.com/947480/calculate-the-maximum-power-dissipated-in-the-coil?show=947872#a947872Sat, 17 Oct 2020 08:06:39 +0000Answered: determine its cross section
https://www.sarthaks.com/923922/determine-its-cross-section?show=934642#a934642
0.0017 may be...i am not sureElectronicshttps://www.sarthaks.com/923922/determine-its-cross-section?show=934642#a934642Sun, 11 Oct 2020 03:37:21 +0000Answered: Derive the truth table for the following Boolean expression.
https://www.sarthaks.com/934162/derive-thetruth-tablefor-the-following-boolean-expression?show=934599#a934599
<p><span style="color:#000000">Furdunji Naoroji founded the Rahnumai Mazdayasnan Sabha <strong>1851.</strong></span></p>Electronicshttps://www.sarthaks.com/934162/derive-thetruth-tablefor-the-following-boolean-expression?show=934599#a934599Sat, 10 Oct 2020 17:26:24 +0000How to solve circuit questions with two batteries
https://www.sarthaks.com/894290/how-to-solve-circuit-questions-with-two-batteries
Electronicshttps://www.sarthaks.com/894290/how-to-solve-circuit-questions-with-two-batteriesSat, 05 Sep 2020 06:02:58 +0000Answered: A capacitor consists of two what
https://www.sarthaks.com/885668/a-capacitor-consists-of-two-what?show=885675#a885675
<p><span style="color:#000000">Two conductors separated by an insulator</span></p>Electronicshttps://www.sarthaks.com/885668/a-capacitor-consists-of-two-what?show=885675#a885675Sat, 29 Aug 2020 07:02:20 +0000Finding the solutions to the circuit
https://www.sarthaks.com/873276/finding-the-solutions-to-the-circuit
<p><img alt="" src="https://share.icloud.com/photos/0R1F7uqyo7sDXRx2xFyM14dAg"></p><p>Please help</p>Electronicshttps://www.sarthaks.com/873276/finding-the-solutions-to-the-circuitWed, 19 Aug 2020 13:56:20 +0000aanalyze the algebraic expression based on.. Number of gates..diagram..truth table
https://www.sarthaks.com/870957/aanalyze-the-algebraic-expression-based-on-number-of-gates-diagram-truth-table
Y=A(B'+C'),<br />
Y=(A+B+C)AB'Electronicshttps://www.sarthaks.com/870957/aanalyze-the-algebraic-expression-based-on-number-of-gates-diagram-truth-tableTue, 18 Aug 2020 06:52:14 +0000transformer problem
https://www.sarthaks.com/860839/transformer-problem
A single phase 10KVA, 3300/400 V transformer has the following winding resistances and reactances r1= 0.7 Ω, r2=0.011 Ω, x1= 3.6 Ω and x2 = 0.045 Ω. The transformer is supplying the load at 0.8 pf lagging. Calculate the voltage regulation and efficiency of transformer (i) at full load, (ii) at half load. Determine the load current at maximum efficiencyElectronicshttps://www.sarthaks.com/860839/transformer-problemMon, 10 Aug 2020 04:13:31 +0000Translary scheme is essentially a __ balancing system.
https://www.sarthaks.com/860804/translary-scheme-is-essentially-a-balancing-system
Electronicshttps://www.sarthaks.com/860804/translary-scheme-is-essentially-a-balancing-systemMon, 10 Aug 2020 03:47:03 +0000Answered: What is the main advantage of a thyristor choppers over transistor choppers?
https://www.sarthaks.com/855680/what-is-the-main-advantage-of-a-thyristor-choppers-over-transistor-choppers?show=855683#a855683
<p><span style="color:#000000">The gate controls the flow of current between the anode and cathode. The primary function of a thyristor is to control electric power and current by acting as a switch. Thyristors are used in a wide range of electric circuits, from simple burglar alarms to power transmission lines.</span></p>Electronicshttps://www.sarthaks.com/855680/what-is-the-main-advantage-of-a-thyristor-choppers-over-transistor-choppers?show=855683#a855683Thu, 06 Aug 2020 03:12:50 +0000Answered: The force between two electrons separated by a distance R varies
https://www.sarthaks.com/852544/the-force-between-two-electrons-separated-by-a-distance-r-varies?show=852555#a852555
<p><span style="color:#000000">The force acting between two charged particle is given by :</span></p><p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=12045885802959031965" style="height:45px; width:104px"></span></p><p><span style="color:#000000"><strong>Where</strong></span></p><p><span style="color:#000000">k is the electrostatic constant</span></p><p><span style="color:#000000">r is the separation between the electrons</span></p><p><span style="color:#000000">It is clear from the above formula that the force between two electrons is inversely proportional to the distance between them.</span></p>Electronicshttps://www.sarthaks.com/852544/the-force-between-two-electrons-separated-by-a-distance-r-varies?show=852555#a852555Mon, 03 Aug 2020 13:38:10 +0000Answered: Energy conservation and audit
https://www.sarthaks.com/852543/energy-conservation-and-audit?show=852552#a852552
<p><span style="color:#000000">An energy audit is an inspection survey and an analysis of energy flows for energy conservation in a building. It may include a process or system to reduce the amount of energy input into the system without negatively affecting the output.</span></p>Electronicshttps://www.sarthaks.com/852543/energy-conservation-and-audit?show=852552#a852552Mon, 03 Aug 2020 13:34:57 +0000WHAT IS THE LINE CURRENT WHEN ONE OF THE LINE IS OPENED
https://www.sarthaks.com/837350/what-is-the-line-current-when-one-of-the-line-is-opened
A 3 phase 3 wire , 100v system supplies a balanced delta connected load of z=2+j7 ohm. Find the line current when one of the line is opened.Electronicshttps://www.sarthaks.com/837350/what-is-the-line-current-when-one-of-the-line-is-openedFri, 17 Jul 2020 03:26:03 +0000Show that the voltage across base – emitter junction of a BJT increases by about 20 mV if its emitter current doubles at room temperature.
https://www.sarthaks.com/830886/voltage-across-emitter-junction-increases-about-emitter-current-doubles-room-temperature
Show that the voltage across base – emitter junction of a BJT increases by about 20 mV if its emitter current doubles at room temperature.Electronicshttps://www.sarthaks.com/830886/voltage-across-emitter-junction-increases-about-emitter-current-doubles-room-temperatureSun, 05 Jul 2020 13:03:47 +0000Answered: Explain with aid of sketch the different between J-K and S-R Flip flops.
https://www.sarthaks.com/824792/explain-with-aid-of-sketch-the-different-between-j-k-and-s-r-flip-flops?show=826673#a826673
<p><span style="color:#000000">The main difference between a JK flip-flop and an SR flip-flop is that in the JK flip-flop, both inputs can be HIGH. When both the J and K inputs are HIGH, the Q output is toggled, which means that the output alternates between HIGH and LOW. Thereby the invalid condition which occurs in the SR flipflop is eliminated.</span></p>Electronicshttps://www.sarthaks.com/824792/explain-with-aid-of-sketch-the-different-between-j-k-and-s-r-flip-flops?show=826673#a826673Wed, 01 Jul 2020 06:22:48 +0000Answered: Find induced emf
https://www.sarthaks.com/819157/find-induced-emf?show=821402#a821402
0.3 volt............Electronicshttps://www.sarthaks.com/819157/find-induced-emf?show=821402#a821402Thu, 25 Jun 2020 07:39:19 +0000Answered: . In a series R, L circuit, voltage across resistor and inductor are 3 V and 4 V respectively, then what is the applied voltage
https://www.sarthaks.com/815747/series-circuit-voltage-across-resistor-inductor-respectively-then-what-applied-voltage?show=817058#a817058
<p><span style="color:#000000"><strong>Answer : 5 V</strong></span></p><p><strong><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=13129810987300993182" style="height:82px; width:133px"></span></strong></p>Electronicshttps://www.sarthaks.com/815747/series-circuit-voltage-across-resistor-inductor-respectively-then-what-applied-voltage?show=817058#a817058Mon, 22 Jun 2020 07:11:50 +0000deflecting torque in a PMMC when current is directly proportional to deflection torque
https://www.sarthaks.com/812021/deflecting-torque-in-a-pmmc-when-current-is-directly-proportional-to-deflection-torque
A PMMC instrument has a full scale deflection of 60 degree for a current of 2A. The deflecting torque in a PMMC ammeter is directly proportional to current in moving coil. Find the value of current required for a deflection of 30 degree if the instrument is (a) spring controlled<br />
<br />
(b) gravity controlledElectronicshttps://www.sarthaks.com/812021/deflecting-torque-in-a-pmmc-when-current-is-directly-proportional-to-deflection-torqueThu, 18 Jun 2020 07:37:34 +0000Answered: pn junction diode
https://www.sarthaks.com/799316/pn-junction-diode?show=800887#a800887
<p><span style="color:#000000">Given,<br>A PN junction is in series with 100 ohms resistor PN junction is basically a diode. The circuit is shown below</span></p><p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=13459585985314967567" style="height:244px; width:415px"></span></p><p><span style="color:#000000">Forward current through diode is 100 mA.</span></p><p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=4872449878701812625" style="height:143px; width:355px"></span></p><p><span style="color:#000000">When the voltage is reversed the PN junction is switched from conduction state. It needs same time to return to non- conduction state, so the PN junction behaves as a short circuit for the little time even in reverse direction.<br>This is due to accumulation of stored access minority charge when diode is forward biased <strong>so, the current will be –100 mA.</strong></span></p>Electronicshttps://www.sarthaks.com/799316/pn-junction-diode?show=800887#a800887Thu, 11 Jun 2020 05:50:51 +0000considwr lossless antenna with directive gain 5. db. if 10 mW of power is fed to it , what will be the total power radiated?
https://www.sarthaks.com/800205/considwr-lossless-antenna-with-directive-gain-power-fed-what-will-the-total-power-radiated
Electronicshttps://www.sarthaks.com/800205/considwr-lossless-antenna-with-directive-gain-power-fed-what-will-the-total-power-radiatedWed, 10 Jun 2020 11:37:10 +0000Answered: Pn junction diode
https://www.sarthaks.com/799322/pn-junction-diode?show=799361#a799361
<p><span style="color:#000000">A PN-junction diode is formed when a p-type semiconductor is fused to an n-type semiconductor creating a potential barrier voltage across the diode junction.</span></p>Electronicshttps://www.sarthaks.com/799322/pn-junction-diode?show=799361#a799361Wed, 10 Jun 2020 06:30:39 +0000Answered: Draw and explain the binary full adder. Realize the implementation of full adder using a pair of half adders. Also draw the truth table.
https://www.sarthaks.com/797055/explain-binary-adder-realize-implementation-full-adder-using-pair-half-adders-truth-table?show=797421#a797421
<p><span style="color:#000000"><strong>Full Adder </strong></span></p><p><span style="color:#000000">This adder is difficult to implement than a half-adder. The difference between a half-adder and a full-adder is that the full-adder has three inputs and two outputs, whereas half adder has only two inputs and two outputs. The first two inputs are A and B and the third input is an input carry as C-IN. When a full-adder logic is designed, you string eight of them together to create a byte-wide adder and cascade the carry bit from one adder to the next.</span></p><p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=16672651356581155856" style="height:193px; width:442px"></span></p><p><span style="color:#000000">The output carry is designated as C-OUT and the normal output is designated as S.</span></p><h3><span style="color:#000000"><strong>Full Adder Truth Table:</strong></span></h3><div><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=4158250870780798843" style="height:241px; width:433px"></span></div><div><p><span style="color:#000000">With the truth-table, the full adder logic can be implemented. You can see that the output S is an XOR between the input A and the half-adder, SUM output with B and C-IN inputs. We take C-OUT will only be true if any of the two inputs out of the three are HIGH.</span></p><p><span style="color:#000000">So, we can implement a full adder circuit with the help of two half adder circuits. At first, half adder will be used to add A and B to produce a partial Sum and a second half adder logic can be used to add C-IN to the Sum produced by the first half adder to get the final S output.</span></p><p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=16119201059461706994" style="height:218px; width:311px"></span></p><p><span style="color:#000000">If any of the half adder logic produces a carry, there will be an output carry. So, COUT will be an OR function of the half-adder Carry outputs. Take a look at the implementation of the full adder circuit shown below.</span></p><p><span style="color:#000000">The implementation of larger logic diagrams is possible with the above full adder logic a simpler symbol is mostly used to represent the operation. Given below is a simpler schematic representation of a one-bit full adder.</span></p><p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=5904253171772849146" style="height:162px; width:428px"></span></p><p><span style="color:#000000">With this type of symbol, we can add two bits together, taking a carry from the next lower order of magnitude, and sending a carry to the next higher order of magnitude. In a computer, for a multi-bit operation, each bit must be represented by a full adder and must be added simultaneously. Thus, to add two 8-bit numbers, you will need 8 full adders which can be formed by cascading two of the 4-bit blocks.</span></p><p><span style="color:#000000">Combinational circuit combines the different gates in the circuit for example encoder, decoder, multiplexer and demultiplexer. Characteristics of combinational circuits are as follows.</span></p><ul><li><span style="color:#000000">The output at any instant of time, depends only on the levels present at input terminals.</span></li><li><span style="color:#000000">It does not use any memory. The previous state of input does not have any effect on the present state of the circuit.</span></li><li><span style="color:#000000">It can have a number of inputs and m number of outputs.</span></li></ul><p><span style="color:#000000">The relationship between the Full-Adder and the Half-Adder is half adder produces results and full adder uses half adder to produce some other result. Similarly, while the Full-Adder is of two Half-Adders, the Full-Adder is the actual block that we use to create the arithmetic circuits.</span></p></div>Electronicshttps://www.sarthaks.com/797055/explain-binary-adder-realize-implementation-full-adder-using-pair-half-adders-truth-table?show=797421#a797421Mon, 08 Jun 2020 04:07:29 +0000What is this question answer?
https://www.sarthaks.com/797054/what-is-this-question-answer
A 240 V, 50 Hz voltage is applied to the primary of a 20:1 step down center<br />
– tapped transformer used in the full wave rectifier having a load of 900 Ω.<br />
If the diode resistance and the secondary coil resistance together is 100 Ω,<br />
determine the following:<br />
a. dc current flowing through the load<br />
b. dc voltage across the load<br />
c. dc power delivered to the load<br />
d. PIV across each diode.Electronicshttps://www.sarthaks.com/797054/what-is-this-question-answerSat, 06 Jun 2020 16:16:37 +0000Write the equation of a voltage wave having peak to peak value of 60 volt, period of 2 μs and phase angle of +30° and sketch the wave.
https://www.sarthaks.com/789498/write-the-equation-voltage-wave-having-peak-peak-value-volt-period-phase-angle-sketch-wave
Electronicshttps://www.sarthaks.com/789498/write-the-equation-voltage-wave-having-peak-peak-value-volt-period-phase-angle-sketch-waveSun, 31 May 2020 16:06:49 +0000Answered: Spindal machine work
https://www.sarthaks.com/787735/spindal-machine-work?show=787778#a787778
<p><span style="color:#000000">Spindle moulder machine are commonly used to trim and shape wood to make it ideal for various uses such as in shutters, windows, frames, doors, etc.</span></p><p><span style="color:#000000">These tools also allow tenoning for window assemblage, that is, a milling process used to join side jambs to head jambs in window frames and frames in general.</span></p><p><span style="color:#000000">These are ‘secondary processing’ tools, which work on solid wood and are not used on timber that is to be cut to measure, but on wood that is to be finished, milled and subsequently worked.</span></p><p><span style="color:#000000">The guard's main purpose is to provide pressure on the workpiece to hold it very firmly onto the table and horizontally against the fence. Compared to its smaller cousin, the router table, a spindle moulder is able to produce work with a much larger profile such as a crown moulding.</span></p>Electronicshttps://www.sarthaks.com/787735/spindal-machine-work?show=787778#a787778Sat, 30 May 2020 05:31:39 +0000Answered: Using Nodal analysis. Hint: you can convert voltage source to current one.
https://www.sarthaks.com/781566/using-nodal-analysis-hint-you-can-convert-voltage-source-to-current-one?show=785109#a785109
<p><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=15022382151226228783" style="height:279px; width:600px">....,.............</p>Electronicshttps://www.sarthaks.com/781566/using-nodal-analysis-hint-you-can-convert-voltage-source-to-current-one?show=785109#a785109Thu, 28 May 2020 15:53:38 +0000Answered: Find the capacitance of a capacitor if the voltage across it is 100 volt and the current passing through it is 10∠-90 ° ampere (f = 50Hz)
https://www.sarthaks.com/781564/find-capacitance-capacitor-voltage-across-volt-current-passing-through-10-ampere-50hz?show=783112#a783112
<p><span style="color:#000000">We have V=100 volt</span></p><p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=3793694749744274293" style="height:545px; width:600px"></span></p>Electronicshttps://www.sarthaks.com/781564/find-capacitance-capacitor-voltage-across-volt-current-passing-through-10-ampere-50hz?show=783112#a783112Wed, 27 May 2020 13:45:57 +0000Answered: A sinusoidal wave has frequency of 250 KHz what is the angular velocity representing this wave. of the phasor representing this wave
https://www.sarthaks.com/781563/sinusoidal-frequency-angular-velocity-representing-this-wave-phasor-representing-this?show=783091#a783091
<p><span style="color:#000000">We have Frequency=250 KHz</span></p><p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=3019720518105435612" style="height:661px; width:600px"></span></p>Electronicshttps://www.sarthaks.com/781563/sinusoidal-frequency-angular-velocity-representing-this-wave-phasor-representing-this?show=783091#a783091Wed, 27 May 2020 13:39:37 +0000Find the output voltage in the circuit shown in figure 7 across the inductance
https://www.sarthaks.com/781572/find-the-output-voltage-in-the-circuit-shown-in-figure-7-across-the-inductance
Electronicshttps://www.sarthaks.com/781572/find-the-output-voltage-in-the-circuit-shown-in-figure-7-across-the-inductanceWed, 27 May 2020 00:51:03 +0000Determine the in Cartesian and polar form for the portion of the circuit shown in figure 6 and hence find it as function of time
https://www.sarthaks.com/781571/determine-cartesian-and-polar-form-portion-circuit-shown-figure-hence-find-function-time
Electronicshttps://www.sarthaks.com/781571/determine-cartesian-and-polar-form-portion-circuit-shown-figure-hence-find-function-timeWed, 27 May 2020 00:50:41 +0000Represent the following AC voltage and currents in complex form (Cartesian and Polar)
https://www.sarthaks.com/781570/represent-the-following-ac-voltage-and-currents-in-complex-form-cartesian-and-polar
Electronicshttps://www.sarthaks.com/781570/represent-the-following-ac-voltage-and-currents-in-complex-form-cartesian-and-polarWed, 27 May 2020 00:50:03 +0000Using Norton Theorem at as load resistance
https://www.sarthaks.com/781568/using-norton-theorem-at-as-load-resistance
Electronicshttps://www.sarthaks.com/781568/using-norton-theorem-at-as-load-resistanceWed, 27 May 2020 00:40:45 +0000Using Thevenin Theorem at R5 as load resistance,
https://www.sarthaks.com/781567/using-thevenin-theorem-at-r5-as-load-resistance
Electronicshttps://www.sarthaks.com/781567/using-thevenin-theorem-at-r5-as-load-resistanceWed, 27 May 2020 00:39:32 +0000write the circuit equations and then find a complete solution “All current and voltage and power at each element” for each one: Using Mesh analysis
https://www.sarthaks.com/781565/write-circuit-equations-complete-solution-current-voltage-power-element-using-analysis
Electronicshttps://www.sarthaks.com/781565/write-circuit-equations-complete-solution-current-voltage-power-element-using-analysisWed, 27 May 2020 00:36:30 +0000A sinusoidal wave has frequency of 250 KHz what is the angular velocity representing this wave.
https://www.sarthaks.com/781562/sinusoidal-wave-has-frequency-of-250-khz-what-the-angular-velocity-representing-this-wave
Electronicshttps://www.sarthaks.com/781562/sinusoidal-wave-has-frequency-of-250-khz-what-the-angular-velocity-representing-this-waveWed, 27 May 2020 00:22:29 +0000Using superposition theorem determine the current passing through voltage source in
https://www.sarthaks.com/781561/using-superposition-theorem-determine-the-current-passing-through-voltage-source-in
Electronicshttps://www.sarthaks.com/781561/using-superposition-theorem-determine-the-current-passing-through-voltage-source-inWed, 27 May 2020 00:21:32 +0000Solve the following linear system of equation using Cramer method.
https://www.sarthaks.com/781559/solve-the-following-linear-system-of-equation-using-cramer-method
Electronicshttps://www.sarthaks.com/781559/solve-the-following-linear-system-of-equation-using-cramer-methodWed, 27 May 2020 00:10:03 +0000Answered: An alternating current is given by the expression i = 30 sin 314t, Determine (a) Maximum value of current (b) Frequency.
https://www.sarthaks.com/780077/alternating-current-given-expression-sin-314t-determine-maximum-value-current-frequency?show=780081#a780081
<p>Given expression i = 30 sin 314t</p><p><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=15463339343991104689" style="height:800px; width:600px"></p>Electronicshttps://www.sarthaks.com/780077/alternating-current-given-expression-sin-314t-determine-maximum-value-current-frequency?show=780081#a780081Mon, 25 May 2020 16:07:47 +0000Capacitor as voltage limiter
https://www.sarthaks.com/778859/capacitor-as-voltage-limiter
Explain how capacitor can be used as voltage limiter in the ac circuitElectronicshttps://www.sarthaks.com/778859/capacitor-as-voltage-limiterSun, 24 May 2020 08:25:26 +0000In a transistor, IB = 60µA, IE = 40mA, and β = 400. Find the value of α.
https://www.sarthaks.com/778326/in-a-transistor-ib-60a-ie-40ma-and-400-find-the-value-of
<p><span style="color:#000000">In a transistor, IB = 60µA, IE = 40mA, and β = 400. Find the value of α.</span></p>Electronicshttps://www.sarthaks.com/778326/in-a-transistor-ib-60a-ie-40ma-and-400-find-the-value-ofSat, 23 May 2020 19:19:36 +00003 phase circuit
https://www.sarthaks.com/777143/3-phase-circuit
A factory takes the following balanced loads from a 440-V, 3-phase, 50-Hz supply:<br />
(a) A lighting load of 20 kW (b) a continuous motor load of 30 kVA at 0.5 p.f. lagging.<br />
(c) An intermittent welding load of 30 kVA at 0.5 p.f. lagging. Calculate the kVA rating of the capacitor <br />
bank required to improve the power factor of loads (a) and (b) Together to unity. Give also the value of <br />
capacitor required in each phase if a star-connected bank is employed. What is the new overall p.f. if, <br />
after correction has been applied, the welding load is switched on.Electronicshttps://www.sarthaks.com/777143/3-phase-circuitSat, 23 May 2020 08:55:17 +0000Answered: It is a question based on 3 phase system
https://www.sarthaks.com/774012/it-is-a-question-based-on-3-phase-system?show=777075#a777075
<p>We have V =10 volt, F=159 kHz</p><p><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=8527920702572235882" style="height:861px; width:600px"></p><p><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=10980281134277233091" style="height:740px; width:600px"></p><p><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=1672955555593524929" style="height:529px; width:600px"></p>Electronicshttps://www.sarthaks.com/774012/it-is-a-question-based-on-3-phase-system?show=777075#a777075Sat, 23 May 2020 08:16:21 +0000Find current
https://www.sarthaks.com/776581/find-current
Using appropriate network solution technique, determine currents i1 , i2 and i 3 shown in Fig. 1.Electronicshttps://www.sarthaks.com/776581/find-currentSat, 23 May 2020 05:01:16 +0000Find current power and power factor
https://www.sarthaks.com/773977/find-current-power-and-power-factor
An inductive coil has a resistance of 15 takes a current of 4 Amp when connected to [6] 100 volts, 60 Hz supply. If the coil is connected to a 100 volts, 50 Hz supply, calculate<br />
a) the current b) power c) power factor.Electronicshttps://www.sarthaks.com/773977/find-current-power-and-power-factorFri, 22 May 2020 04:58:18 +0000Answered: Current through 5ohm
https://www.sarthaks.com/769017/current-through-5ohm?show=769612#a769612
Please complete your questionElectronicshttps://www.sarthaks.com/769017/current-through-5ohm?show=769612#a769612Wed, 20 May 2020 07:50:45 +0000Boolean expression
https://www.sarthaks.com/769005/boolean-expression
Simplify the following Boolean expression: [4] Y=ABCD+ABCD+ABCD+ABCDElectronicshttps://www.sarthaks.com/769005/boolean-expressionWed, 20 May 2020 05:36:12 +0000Answered: About capacitor charging
https://www.sarthaks.com/768840/about-capacitor-charging?show=768901#a768901
<p><span style="color:#000000">The figure below shows a capacitor, ( C ) in series with a resistor, ( R ) forming a RC Charging Circuit connected across a DC battery supply ( Vs ) via a mechanical switch. at time zero, when the switch is first closed, the capacitor gradually charges up through the resistor until the voltage across it reaches the supply voltage of the battery. The manner in which the capacitor charges up is shown below.</span></p><p><span style="color:#000000"><strong>RC Charging Circuit</strong></span></p><p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=15238137614985452530" style="height:204px; width:396px"></span></p><p><span style="color:#000000">Let us assume above, that the capacitor, C is fully “discharged” and the switch (S) is fully open. These are the initial conditions of the circuit, then t = 0, i = 0 and q = 0. When the switch is closed the time begins at t = 0 and current begins to flow into the capacitor via the resistor.</span></p><p><span style="color:#000000">Since the initial voltage across the capacitor is zero, ( Vc = 0 ) at t = 0 the capacitor appears to be a short circuit to the external circuit and the maximum current flows through the circuit restricted only by the resistor R. Then by <strong>using Kirchhoff’s voltage law (KVL)</strong>, the voltage drops around the circuit are given as:</span></p><p><span style="color:#000000">V<sub>s</sub>-R x i(t)-V<sub>c</sub>(t)=0</span></p><p><span style="color:#000000">The current now flowing around the circuit is called the Charging Current and is found by using <strong>Ohms law as: i = Vs/R.</strong></span></p><p><span style="color:#000000"><strong>RC Charging Circuit Curves</strong></span></p><p><span style="color:#000000"><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=11922895958856692214" style="height:577px; width:487px"></span></p>Electronicshttps://www.sarthaks.com/768840/about-capacitor-charging?show=768901#a768901Wed, 20 May 2020 04:13:14 +0000Answered: Electric circuits
https://www.sarthaks.com/765934/electric-circuits?show=767408#a767408
<p>Answer to your question:</p><p><img alt="" src="https://www.sarthaks.com/?qa=blob&qa_blobid=6448128683312530718" style="height:800px; width:600px"></p>Electronicshttps://www.sarthaks.com/765934/electric-circuits?show=767408#a767408Tue, 19 May 2020 10:43:12 +0000