Physics
Electrostatics
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#17 The SI unit of capacitance is
A) Farad
B) Coulomb/Volt
C) Both A and B
D) Neither A nor B
#18 The capacitance of a parallel plate capacitor is
A) $\frac{\epsilon_{0}A}{d}$
B) $\frac{\epsilon_{0}d}{A}$
C) $\frac{A}{\epsilon_{0}d}$
D) $\frac{d}{\epsilon_{0}A}$
#19 If the area of the plates of a parallel plate capacitor is doubled, the capacitance becomes
A) Half
B) Double
C) One-fourth
D) Four times
#20 If the distance between the plates of a parallel plate capacitor is doubled, the capacitance becomes
A) Half
B) Double
C) One-fourth
D) Four times
#21 The energy stored in a capacitor is
A) $\frac{1}{2}CV^{2}$
B) $\frac{1}{2}QV$
C) $\frac{1}{2}\frac{Q^{2}}{C}$
D) All of these
#22 If the charge on a capacitor is doubled, the energy stored becomes
A) Half
B) Double
C) One-fourth
D) Four times
#23 If the voltage across a capacitor is doubled, the energy stored becomes
A) Half
B) Double
C) One-fourth
D) Four times
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