Question

Which device can be used to store charge ?
1. Diode
2. Resistor
3. Transistor
4. Capacitor

Answer 1

Correct Answer - Option 4 : Capacitor

The correct answer is Capacitor.

• A capacitor (condenser) is a passive two-terminal electrical component used to store energy electrostatically in an electric field.
• The forms of practical capacitors vary widely, but all contain at least two electrical conductors (plates) separated by a dielectric (i.e., insulator).
•  A capacitor disconnects current in DC and short circuits in AC circuits.
• The SI unit of capacitance is the farad (F), which is equal to one coulomb per volt (1 C/V).

Diode	It is a two-terminal electronic component that only conducts current in one direction (so long as it is operated within a specified voltage level). An ideal diode will have zero resistance in one direction, and infinite resistance in the reverse direction. The types of diode include Zener diode, PN junction diode, Tunnel diode, Varactor diode, Schottky diode, Photodiode, PIN diode, Light-emitting diode, etc.
Resistor	It is a passive electrical component to create resistance in the flow of electric current. The resistance is measured in ohms.
Transistor	It is a semiconductor device that can be used to both conduct and insulate electric current or voltage. It can work either as an amplifier or a switch. Transistors are basically classified into two types: they are Bipolar Junction Transistors (BJT) and Field Effect Transistors (FET). The BJTs are again classified into NPN and PNP transistors. A transistor consists of two PN diodes connected back to back. It has three terminals namely emitter, base, and collector.