Practice the Class 7 Science MCQ Questions of Electric Current and Its Effects with Answers. MCQ Questions for Class 7 Science with Answers were arranged dependent on the most recent pattern of the exam. We have Provided Electric Current and Its Effects Class 7 Science MCQ Questions with Answers to help understudies comprehend the idea well indeed.
You can refer to NCERT Solutions for Class 7 Science Electric Current and Its Effects to overhaul the ideas in the syllabus viably and work on your shots at getting excellent marks in your board tests. Understand your preparation level of multiple choice Questions for Class 7 with Answers. You can in like manner check your answers from our offered Multiple Choice Questions to Class 11 with Responses.
Practice MCQ Questions for Class 7 Science
1. In making a battery
(a) positive terminal of one cell is connected to the negative terminal of the next cell
(b) positive terminal of one cell is connected to the positive terminal of the next cell
(c) negative terminal of one cell is connected to the negative terminal of the next cell
(d) none of the above
2. Where can the key or switch be placed in the circuit?
(a) Left side of the battery
(b) Right side of the battery
(c) Can be placed anywhere in the circuit
(d) Near the positive terminal of the bulb
3.The coil of wire contained in an electric heater is known as
(a) component
(b) element
(c) circuit
(d) spring
4. Which mark is necessary on electric appliances?
(a) AGMARK
(b) ISI
(c) FICCI
(d) KSK
5. When a switch is in OFF position.
(i) circuit starting from the positive terminal of the cell stops at the switch.
(ii) circuit is open.
(iii) no current flows through it.
(iv) current flows after some time.
Choose the combination of correct answer from the following:
(a) all are correct
(b) (ii) and (iii) are correct
(c) only (iv) is correct
(d) only (i) and (ii) are correct
6. Which of the following precautions need not be taken while using electric gadgets / appliances/circuit?
(a) We should never touch a lighted electric bulb connected to the mains.
(b) We should never experiment with the electric supply from the mains or a generator or an inverter.
(c) We should never use just any wire or strip of metal in place of a fuse.
(d) We should never turn the switch in ON position
7. The soft-iron core of an electromagnet loses its magnetism once the current passing through the electromagnetic coil stops because.
(a) Domains lose their alignment when the current is stopped
(b) Iron cannot hold alignment for longer time even when the current is passing through the coil
(c) Magnetic properties of iron are weak
(d) Domains inside the iron get aligned in north to south direction
8. A __ is used in torches.
(a) Generator
(b) Fuse
(c) Secondary cell
(d) Dry cell
9. An element measure the flowing an electric current is:
(a) voltmeter
(b) filament
(c) circuit
(d) ammeter
10. Electromagnet is used in
(a) Battery
(b) Dry cell
(c) Electric bell
(d) Fuse
11. The bulb glows only when ................. flows through it.
(a) Current
(b) Light
(c) Air
(d) Water
12. An element measure the potential difference between two points in an electric circuit is:
(a) voltmeter
(b) filament
(c) circuit
(d) ammeter
13. A device which prevents or allows the current to flow through it
(a) Motor
(b) Terminal
(c) Conductor
(d) Switch
14. Electric current has energy called:
(a) voltmeter
(b) filament
(c) electrical energy
(d) none of these
15. The metal which is poor conductor of electricity is
(a) Gold
(b) Iron
(c) Aluminium
(d) tungsten
16. The amount of heat produced in a wire depends on its material-
(a) Length
(b) Thickness
(c) Length and thickness
(d) None of these
17. If a piece of soft iron is placed inside the coil n number of turns and current is passed in the coil from a battery, what name is then given to the device so obtained ?
(a) spectrometer
(b) gravitometer
(c) barometer
(d) electromagnet
18. If the coil in a simple generator is wound around a soft iron core then:
(a) strength of magnetic field increases.
(b) current produced will be increased.
(c) voltage produced will be increased
(d) all
19. In a bulb there is a thin wire called
(a) filament
(b) coil
(c) element
(d) fuse wire
20. A glowing bulb becomes warm due to the
(a) heating effect of current
(b) magnetic effect of current
(c) chemical effect of current
(d) physical effect of current
21. Which of the following is being used in place of fuses?
(a) MCB
(b) Nichrome
(c) Filament
(d) Switch
22. When electric current passes through a wire, it behave like a
(a) battery
(b) magnet
(c) fuse
(d) compass needle
23. Fuse wire is generally made of
(a) tin and lead
(b) nickel and chromium
(c) nickel and copper
(d) chromium and silver
24. Coils of heating devices are made up of
(a) Mercury
(b) Nichrome
(c) Copper
(d) Tungsten
25. When electric current flows through a conductor, some amount of:
(a) electrical energy is converted into heat energy
(b) electrical energy is converted into mechanical energy
(c) mechanical energy is converted into electrical energy
(d) heat energy is converted into electrical energy