Understanding Capacitance Concepts

What is the unit of capacitance?

• watt (W)

• ohm (Ω)

• farad (F)

• volt (V)

Which of the following describes a capacitor?

• A component that regulates voltage levels.

• A device that stores electrical energy.

• A type of resistor used in circuits.

• A device that amplifies electrical signals.

What is the formula for the capacitance of a parallel-plate capacitor?

• C = (A * d)/ε₀

• C = ε₀ * (d + A)

• C = ε₀ * (A/d)

• C = ε₀ * (d/A)

If a capacitor has a capacitance of 5 µF and a voltage of 10 V, what is the charge stored?

• 5 µC

• 20 µC

• 100 µC

• 50 µC

What happens to the equivalent capacitance when capacitors are connected in series?

• The equivalent capacitance increases.

• The equivalent capacitance decreases.

• The equivalent capacitance becomes zero.

• The equivalent capacitance remains the same.

How do you calculate the total capacitance of capacitors in parallel?

• C_total = C1 * C2 * C3 * ... * Cn

• C_total = 1/(1/C1 + 1/C2 + 1/C3 + ... + 1/Cn

• C_total = C1 - C2 - C3 - ... - Cn

• C_total = C1 + C2 + C3 + ... + Cn

What is the energy stored in a capacitor with a charge of 2 C and a voltage of 5 V?

• 10 J

• 5 J

• 1 J

• 2 J

Which equation represents the energy stored in a capacitor?

• E = C V^2 / 2

• E = 1/2 C V

• E = C V

• E = 1/2 C V^2

If two capacitors of 4 µF and 6 µF are in series, what is the equivalent capacitance?

• 1.5 µF

• 5.0 µF

• 2.4 µF

• 3.0 µF

What is the effect of increasing the plate area of a parallel-plate capacitor?

• The capacitance decreases.

• The capacitance remains the same.

• The capacitance increases.

• The voltage across the plates increases.