## Capacitance and Capacitor- MCQ-Basic

Physics is an important subject in preparation for various Competitive exams. To keep a track of your preparation we have designed a small quiz of 10 Basic Level Questions on Capacitance and Capacitor.You have 10 minutes to solve the quiz, click the start timer button in order to start the timer and then click on submit button at the end to submit the quiz and view your scores and correct answers.

Q1. A parallel plate capacitor carries a charge q. The distance between the plates is doubled by application of a force. The work done by the force is

•  Zero
•  q2/C
•  q2/2C
•  q2/4C

q2/2C

Q2. Capacitance of a parallel plate capacitor becomes 4/3 times its original value if a dielectric slab of thickness t = d/2 is inserted between the plates (d is the separation between the plates). The dielectric constant of the slab is

•  8
•  4
•  6
•  2

2

Q3. What fraction of the energy drawn from the charging battery is stored in a capacitor ?

•  100%
•  75%
•  50%
•  25%

50%

Q4. Capacitance (in F) of a spherical conductor with radius m 1 is

•  1.1 X 10-10
•  10-6
•  9 X 10-9
•  10-5

1.1 X 10-10

Q5. Work done by an external agent in separating the parallel plate capacitor is

•  CV
•  1/2 C2V
•  1/2 CV2
•  None of these

1/2 CV2

Q6. If the distance between parallel plates of a capacitor is halved and dielectric constant is doubled then the capacitance

•  Decreases two times
•  Increases two times
•  Increases four times
•  Remain the same

Increases four times

Q7. A capacitor is used to store 24 watt hour of energy at 1200 volt. What should be the capacitance of the capacitor

•  120mF
•  120Î¼F
•  12Î¼F
•  24mF

120mF

Q8. A metallic sheet is inserted between plates parallel to the plates of a parallel plate capacitor. The capacitance of the capacitor

•  Increases
•  Is dependent on the position of the sheet
•  Is maximum when the metal sheet is in the middle
•  Is maximum when the metal sheet touches one of the capacitor plates

Increases

Q9. The capacity of parallel plate condenser depends on

•  The type of metal used
•  The thickness of plates
•  The potential applied across the plates
•  The separation between the plates

The separation between the plates

Q10. When we touch the terminals of a high voltage capacitor, even after a high voltage has been cut off, then the capacitor has a tendency to

•  Restore energy
•  Discharge energy
•  Affect dangerously
•  Both (b) and (c)

Both (b) and (c)

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