Free Printable Capacitor and Capacitance

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Capacitor and Capacitance

Total questions: 31

Worksheet time: 2hrs 33mins

Name

Class

Date

The amount of charge that a capacitor can accept is determined by

It's capacity C=Q/V

the plate area

the dielectric thickness

all of the above

What is the voltage across the plates of the capacitor if the capacitance is $10\ \mu F$ and the Charge stored is $30\ \mu C$ ?

0.333 V

3 V

300 V

30 V

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?

3.0 V

6.0 V

10 V

14 V

Define capacitance

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

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

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

gradient of charged to p.d. graph

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

3.0 mC

0.30 mC

300 mC

330 kC

A capacitor charged to 6 V stores 4 mJ of energy. If it is charged to 12 V, what is the energy stored (asuming it doesn't blow)?

4 mJ

8 mJ

16 mJ

48 mJ

What is the unit of capacitance?

Coulomb, C

Farad, F

Henry, H

Tesla, T

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

C = Q×V

V = C×Q

V = Q/C

Q = C/V

How is the capacitance of a parallel-plate capacitor affected by the distance between the plates ?

C is directly proportional to the area A of each plate

C is inversely proportional to the distance d between the plates

C is partially proportional to the area A of each plate

C is not affected by the area A of each plate

10.

Capacitor is a device used to store ----

electric charge and power

electric charge and electric energy

electric energy and power

power and potential

11.

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

An inductor

A capacitor

A fixed resistor

A variable resistor

12.

Which of the following statements DOES NOT describe a capacitor an electrical device?

A. It stores charge and electrical potential energy.

B. It is manufactured in many sizes and shapes.

C. It is used to smooth out unwanted fluctuations due to power surges in electronic circuits.

D. It allows current to pass through in any condition.

13.

The energy of a charged capacitor is given by the expression (q= charge on the conductor and C = its capaciance)

$\frac{q^2}{2C}$

$\frac{q^2}{C}$

$\frac{q^{ }}{2C^2}$

$2qC$

14.

Change Q on a capacitor varies with voltage V as shown. The area of triangle OAB represents

capacitance of the capacitor

electric charge on the capacitor

electric field between the plates

energy stored in the capacitor

15.

A 9.0-V battery is connected between two parallel metal plates 4.0 mm apart. What is the magnitude of the electric field between the plates?

2.3 x 10³ N/C

9.0 N/C

2.3 N/C

0.75 x 10^-6 N/C

16.

In which case does an electric field do positive work on a charged particle?

A negative charge moves opposite to the direction of the electric field.

A positive charge is moved to a point of higher potential energy.

A positive charge completes one circular path around a stationary positive charge.

A positive charge completes one elliptical path around a stationary positive charge.

17.

A 9.0-V battery moves 20 mC of charge through a circuit running from its positive terminal to its negative terminal. How much energy was delivered to the circuit?

2.2 mJ

0.020 J

0.18 J

4.5 x 10³ J

18.

Find the electrical potential at 0.15 m from a point charge of 6.0 µC. (ke = 8.99 x 10⁹ Nm²/C²).

5.4 x 10⁴ V

3.6 x 10⁵ V

2.4 x 10⁶ V

1.2 x 10⁷ V

19.

A parallel-plate capacitor has a capacitance of 20 µF. What potential difference across the plates is required to store 7.2 x 10^-4 C on this capacitor?

36 V

2.2 x 10^-2 V

1.4 x 10^-8 V

68 V

20.

A 0.25 µF capacitor is connected to a 400-V battery. What potential energy is stored in the capacitor?

1.2 x 10^-12 J

1.0 x 10^-14 J

0.040 J

0.020 J

21.

A 9.0-V battery moves 20 mC of charge through a circuit running from its positive terminal to its negative terminal. How much energy was delivered to the circuit?

2.2 mJ

0.020 J

0.18 J

4.5 x 10³ J

22.

A parallel-plate capacitor has a capacitance of 20 µF. What potential difference across the plates is required to store 7.2 x 10^-4 C on this capacitor?

36 V

2.2 x 10^-2 V

1.4 x 10^-8 V

68 V

23.

Three capacitors of 1.0 µF, 1.5 µF, and 2.0 µF are connected in series. Find the combined capacitance.

4.5 µF

4.0 µF

2.2 µF

0.46 µF

24.

If three 4.0 µF capacitors are connected in parallel, what is the combined capacitance?

12 µF

0.75 µF

8.0 µF

0.46 µF

25.

What is the equivalent capacitance between points a and b? All capacitors are 1.0 µF.

4.0 µF

17 µF

0.6 µF

0.25 µF

26.

A 0.25 µF capacitor is connected to a 400-V battery. What potential energy is stored in the capacitor?

1.2 x 10^-12 J

1.0 x 10^-14 J

0.040 J

0.020 J

27.

Two capacitors of capacitance C₁ and C₂ are connected in parallel. What is the effective

capacitance?

C₁C₂

C₁+C₂

$\frac{1}{C_1}+\frac{1}{C_2}$

$\frac{C_1C_2}{C_1+C_2}$

28.

The capacitance of a parallel-plate capacitor can be increased by:

increasing the charge

decreasing the charge

increasing the plate separation

decreasing the plate separation

29.

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

An inductor

A capacitor

A fixed resistor

A variable resistor

30.

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

C = Q×V

V = C×Q

V = Q/C

Q = C/V

31.

If C is the capacitance in Farads, ϵ permittivity of the dielectric, A area of plate overlap in square meters and d distance between plates in meters, then:

C = ϵd/A

C = A/ϵd

C = ϵA/d

C = d/ϵA

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Capacitor and Capacitance

Total questions: 31

Worksheet time: 2hrs 33mins

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