Class 12 Physics · Chapter 4 · Test 2
Capacitors and Dielectrics
49 MCQs
49 questions · 40 min · 49 marks
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Sample questions
The first 5 of 49. Try each one, then tap to see the answer.
Question 1
A capacitor is a device that stores electrical energy in the form of:
- AHeat
- BMagnetic field
- CElectric field
- DLight
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Answer: C
A capacitor stores energy in the electric field between its conductors.
Question 2
The ability of an isolated spherical conductor to store charge is called its:
- AResistance
- BCapacitance
- CInductance
- DPotential
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Answer: B
The ability to store electric charge is capacitance.
Question 3
The capacitance of an isolated spherical conductor is defined as:
- AC = V/Q
- BC = QV
- CC = Q²/V
- DC = Q/V
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Answer: D
Capacitance is the charge stored per unit potential at the surface: C = Q/V.
Question 4
The SI unit of capacitance is the:
- AVolt
- BFarad
- CHenry
- DCoulomb
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Answer: B
The SI unit of capacitance is the farad (coulomb per volt).
Question 5
One farad is the capacitance of a conductor that stores:
- A1 coulomb of charge at a potential of 1 volt
- B1 joule of energy at 1 coulomb
- C1 coulomb of charge at 1 joule
- D1 volt per ampere
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Answer: A
1 F = 1 C/1 V.
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