Free Printable Capacitance

1.

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

2.

What is the voltage across the plates of the capacitor if the capacitance is 10 uF and the Charge stored is 30 uC?

a)

0.333 V

b)

3 V

c)

300 V

3.

------------------------ is created out of two metal plates and an insulating material called a dielectric.

a)

An inductor

b)

A capacitor

c)

A fixed resistor

d)

A variable resistor

4.

With respect to the capacitor, which relationship is true? •

a)

C = Q×V

b)

V = C×Q

c)

V = Q/C

d)

Q = C/V

5.

Is it correct to say that the capacitance is inversely proportional to the area of the parallel plates?

a)

True

b)

False

6.

An uncharged capacitor of capacitance 8.0 $\mu F$ is connected to a battery of e.m.f. V and negligible internal resistance. If the charge on each plate of the capacitor is 24 $\mu C$ , what is the value of V?

a)

3.0 V

b)

6.0 V

c)

10 V

d)

14 V

7.

Define capacitance

a)

ratio of p.d. across the capacitance to the charged on either capacitor

b)

ratio of charged on either plates of capacitor to p.d. across the capacitor.

c)

product of charged on either plates and p.d. across the capacitor.

d)

gradient of charged to p.d. graph

8.

A capacitor of capacitance 30μF is fully charged from a 10 V d.c. supply. Calculate the charged stored by the capacitor

a)

3.0 mC

b)

0.30 mC

c)

300 mC

d)

330 kC

9.

An isolated metal sphere has a radius r. When charged to a potential V, the charge on the sphere is q. The charge may be considered to act as a point charge at the centre of the sphere.

What is the capacitance of this isolated sphere?

a)

$\frac{q}{4\pi\epsilon_or}$

b)

$4\pi\epsilon_or$

c)

$\frac{1}{4\pi\epsilon_or}$

d)

Vqr

10.

The equivalent capacitance of three capacitors with capacitance $C_1,\ C_2\ and\ C_3$ connected in series is

a)

$C=C_1+C_2+C_3$

b)

$\frac{1}{C}=\frac{1}{C_1}+\frac{1}{C_2}+\frac{1}{C_3}$

c)

$C=\frac{1}{C_1}+\frac{1}{C_2}+\frac{1}{C_3}$

d)

$\frac{1}{C}=\frac{1}{C_1}\times\frac{1}{C_2}\times\frac{1}{C_3}$

11.

The equivalent capacitance of three capacitors with capacitance $C_1,\ C_2\ and\ C_3$ connected in parallel is

a)

$C=C_1+C_2+C_3$

b)

$\frac{1}{C}=\frac{1}{C_1}+\frac{1}{C_2}+\frac{1}{C_3}$

c)

$C=\frac{1}{C_1}+\frac{1}{C_2}+\frac{1}{C_3}$

d)

$C=C_1C_2C_3$

12.

Is there a limit to the amount of charge that capacitor can hold and why/why not?

a)

Yes, as the ratio of charge to p.d. is fixed.

b)

Yes, because the dielectric will breakdown in such a large field and charge will remain.

c)

No, as capacitance can always increase as p.d. increases.

d)

Yes, because the dielectric will breakdown in such a large field and charge will flow.

Capacitance

Total questions: 12

Worksheet time: 8mins

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