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Capacitors and Units in Physics

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Questions and Answers

What is the proportionality constant that represents a conductor's ability to hold charge and associated electrical energy?

Inductance

Capacitance (correct)

Resistance

Conductance

What is the relationship between charge and potential in a conductor?

Q = V/C

Q ∝ 1/V

Q ∝ V (correct)

Q = CV^2

What happens to a soap bubble or rubber balloon when it is given a charge?

It shrinks

It expands (correct)

It stays the same size

It disappears

What is the direction of the force experienced by a charged conductor?

Outward Signup and view all the answers

What is the electric pressure on a charged conductor?

P = σ²/2ε₀ Signup and view all the answers

What is the unit of capacitance?

Farad Signup and view all the answers

What is the unit of capacitance in the S.I system?

Farad Signup and view all the answers

What is the dimension of capacitance?

[M^-1 L^-2 T^4 A^2] Signup and view all the answers

What is the capacitance of a capacitor?

The ratio of the magnitude of the charge on the positive plate to the magnitude of the potential difference between the plates Signup and view all the answers

What is the net charge on a capacitor?

Zero Signup and view all the answers

What is the energy stored in a capacitor?

CV^2 Signup and view all the answers

What is the energy density of an electric field in a capacitor?

U = ε0E^2/2 Signup and view all the answers

What is the equivalent capacitance when three capacitors are connected in parallel?

C1 + C2 + C3 Signup and view all the answers

If two capacitors having capacitances C1 and C2 are connected in series, what is the voltage across each capacitor?

V1 = V / C1 and V2 = V / C2 Signup and view all the answers

What is the charge on each capacitor when n identical capacitors are connected in series with a supply voltage V?

Q' = nQ Signup and view all the answers

What is the equivalent capacitance when two capacitors are connected in series?

(C1 * C2) / (C1 + C2) Signup and view all the answers

What is the characteristic of capacitors connected in series?

Equivalent capacitance is always lesser than individual capacitances Signup and view all the answers

What is the characteristic of capacitors connected in parallel?

Equivalent capacitance is always greater than individual capacitances Signup and view all the answers