# Top 10 MCQs on Capacitance – Capacitance Multiple Choice Objective Questions

MCQs on Capacitance

Contents

## The SI unit of capacitance is:

The SI unit of capacitance is:

1. Henry
3. Hertz
4. Tesla

## The capacitance of a capacitor is

The capacitance of a capacitor is:

1. Directly proportional to relative permittivity
2. Inversely proportional to relative permittivity
3. Independent of relative permittivity
4. Equal to cube root of relative permittivity

Correct answer: 1. Directly proportional to relative permittivity

## A capacitor opposes the change in

A capacitor opposes the change in:

1. Current
2. Voltage
3. Both of these
4. None of the above

## A liquid having dielectric constant K is added in the empty space between plates of capacitor. The capacitance of capacitor

A liquid having dielectric constant K is added in the empty space between plates of capacitor. The capacitance of capacitor:

1. Decreases by factor K²
2. Increases by factor K²
3. Decreases by factor K
4. Increases by factor K

Correct answer: 4. Increases by factor K

## What happens to p.d, if plates of a charged parallel -plate capacitor are pulled apart

What happens to p.d, if plates of a charged parallel -plate capacitor are pulled apart

1. P.d. Will decrease
2. P.d. Will increase
3. P.d. Will remain unchanged
4. None of above

Correct answer: 2. P.d. Will increase

## Assuming the earth to be a spherical conductor of radius 6400 km, its capacitance is

Assuming the earth to be a spherical conductor of radius 6400 km, its capacitance is

1. 711 µF
2. 644 µF
3. 2000 µF
4. 200 µF

## The trimmer is a type of variable capacitor in which capacitance is changed by changing

The trimmer is a type of variable capacitor in which capacitance is changed by changing:

1. Plate area
2. Distance between plates
3. Dielectric
4. 1 & 3

Correct answer: 2. Distance between plates

## The dielectric used in a variable capacitor is generally

The dielectric used in a variable capacitor is generally:

1. Air
2. Electrolyte
3. Solid
4. None of these

## A voltmeter is connected to the plates of a charged capacitor. If the plates of the capacitor are separated further, the reading of the voltmeter will

A voltmeter is connected to the plates of charged capacitor. If plates of capacitor are separated further, the reading of voltmeter will:

1. Decrease
2. Increase
3. Remain constant
4. Reduce and eventually become zero