1. To charge a 1-F capacitor with 2 C requires a potential difference of:
A.2 V
B.0.2 V
C.5 V
D.0.5 V
E.none of these


2. The capacitance of a parallel-plate capacitor can be increased by:
A.increasing the charge
B.decreasing the charge
C.increasing the plate separation
D.decreasing the plate separation
E.decreasing the plate area


3. The capacitance of a spherical capacitor with inner radius a and outer radius b is proportional to:
A.a/b
B.ba
C.b2a2
D.ab/(ba)
E.ab/(b2a2)


4. A 2-mF and a 1-mF capacitor are connected in series and charged from a battery. They store charges P and Q, respectively. When disconnected and charged separately using the same battery, they have charges R and S, respectively. Then:
A.R > S > Q = P
B.P > Q > R = S
C.R > P = Q > S
D.R = P > S = Q
E.R > P > S = Q


5. A 20-F capacitor is charged to 200 V. Its stored energy is:
A.4000 J
B.4 J
C.0.4 J
D.2000 J
E.0.1 J


6.

The diagram shows six 6-mF capacitors. The capacitance between points a and b is:




A.3 mF
B.4 mF
C.6 mF
D.9 mF
E.1 mF


7. If the charge on a parallel-plate capacitor is doubled:
A.the capacitance is halved
B.the capacitance is doubled
C.the electric field is halved
D.the electric field is doubled
E.the surface charge density is not changed on either plate



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