Understanding Capacitors

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

• 4 µF

• 5 µF

• 1 µF

• 7 µF

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

• 7 µF

• 9 µF

• 10 µF

• 2 µF

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

• 480 µJ

• 900 µJ

• 720 µJ

• 600 µJ

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

• C = (2πL) / ln(b/a)

• C = (4πε₀L) / (b-a)

• C = (ε₀L) / ln(b-a)

• C = (2πε₀L) / ln(b/a)

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

• C = 4πε₀ * (ab)/(b - a)

• C = 4πε₀ * (a*b)/(a + b)

• C = 2πε₀ * (b - a)

• C = 4πε₀ * (a + b)/(b - a)

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

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

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

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

• All of the above

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

• 2 parallel plate capacitors connected in series

• 1 parallel plate capacitor connected to ground

• 2 parallel plate capacitor connected parallely

• None of the above

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

• 700 nF

• 7000 nF

• 750 nF

• 7500 nF

Capacitor consists of two

• Insulator separated by dielectric

• Conductor separated by cylinder

• Conductor separated by insulator

• silver coated insulators

Capacitance of a capacitor does not depend on

• Plate separation

• Plate thickness

• Nature of dielectric

• Plate area