MCQs on Capacitance
Contents
- 1 The SI unit of capacitance is:
- 2 The capacitance of a capacitor is
- 3 A capacitor opposes the change in
- 4 A liquid having dielectric constant K is added in the empty space between plates of capacitor. The capacitance of capacitor
- 5 What happens to p.d, if plates of a charged parallel -plate capacitor are pulled apart
- 6 Assuming the earth to be a spherical conductor of radius 6400 km, its capacitance is
- 7 The trimmer is a type of variable capacitor in which capacitance is changed by changing
- 8 The dielectric used in a variable capacitor is generally
- 9 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
- 10 It is desired to increase the capacitance of a parallel-plate capacitor. Which of following sheet should be introduced between the plates of capacitor
The SI unit of capacitance is:
The SI unit of capacitance is:
- Henry
- Farad
- Hertz
- Tesla
Correct answer: 2. Farad
The capacitance of a capacitor is
The capacitance of a capacitor is:
- Directly proportional to relative permittivity
- Inversely proportional to relative permittivity
- Independent of relative permittivity
- 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:
- Current
- Voltage
- Both of these
- None of the above
Correct answer: 2. Voltage
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:
- Decreases by factor K²
- Increases by factor K²
- Decreases by factor K
- 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
- P.d. Will decrease
- P.d. Will increase
- P.d. Will remain unchanged
- 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
- 711 µF
- 644 µF
- 2000 µF
- 200 µF
Correct answer: 1. 711 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:
- Plate area
- Distance between plates
- Dielectric
- 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:
- Air
- Electrolyte
- Solid
- None of these
Correct answer: 1. Air
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:
- Decrease
- Increase
- Remain constant
- Reduce and eventually become zero
Correct answer: 2. Increase
It is desired to increase the capacitance of a parallel-plate capacitor. Which of following sheet should be introduced between the plates of capacitor
It is desired to increase the capacitance of a parallel-plate capacitor. Which of following sheet should be introduced between the plates of capacitor?
- Copper
- Stainless steel
- Mica
- Tin
Correct answer: 3. Mica