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Worksheets

Understanding Capacitors

Total questions: 10

Worksheet time: 5mins

Name
Class
Date
1.

If three capacitors of 2 µF, 3 µF, and 6 µF are connected in series, what is the total capacitance?

a)

4 µF

b)

5 µF

c)

1 µF

d)

7 µF

2.

Calculate the total capacitance of two capacitors, 4 µF and 5 µF, connected in parallel.

a)

7 µF

b)

9 µF

c)

10 µF

d)

2 µF

3.

What is the energy stored in a capacitor with a capacitance of 10 µF charged to 12 V?

a)

480 µJ

b)

900 µJ

c)

720 µJ

d)

600 µJ

4.

What is the formula for the capacitance of a coaxial cylindrical capacitor?

a)

C = (2πL) / ln(b/a)

b)

C = (4πε₀L) / (b-a)

c)

C = (ε₀L) / ln(b-a)

d)

C = (2πε₀L) / ln(b/a)

5.

What is the formula for the capacitance of a concentric spherical capacitor?

a)

C = 4πε₀ * (ab)/(b - a)

b)

C = 4πε₀ * (a*b)/(a + b)

c)

C = 2πε₀ * (b - a)

d)

C = 4πε₀ * (a + b)/(b - a)

6.

What will the equivalent parallel plate capacitor circuit will look like, if a composite dielectric material is placed in between parallel plate capacitor?

a)

two parallel plate capacitors in series connection with different dielectric in each capacitors

b)

two parallel plate capacitors in parallel connection with different dielectric in each capacitors

c)

It will look like a single parallel plate capacitor with a dielectric material having mean dielectric constant

d)

All of the above

7.

What will be the equivalent parallel plate capacitor circuit look like for a concentric spherical capacitor having its inner sphere grounded to earth

a)

2 parallel plate capacitors connected in series

b)

1 parallel plate capacitor connected to ground

c)

2 parallel plate capacitor connected parallely

d)

None of the above

8.

Find out the capacitance of the earth. The radius of earth ia 6378 km.

a)

700 nF

b)

7000 nF

c)

750 nF

d)

7500 nF

9.

Capacitor consists of two

a)

Insulator separated by dielectric

b)

Conductor separated by cylinder

c)

Conductor separated by insulator

d)

silver coated insulators

10.

Capacitance of a capacitor does not depend on

a)

Plate separation

b)

Plate thickness

c)

Nature of dielectric

d)

Plate area