Electrostatics MCQs
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The ohmmeter reading for a shorted capacitor is
- A. infinity
- B. few kilo ohms
- C. few mega ohms
- D. zero
- Correct Answer: Option D
Internal heating of a capacitor is usually attributed to
- A. leakage resistance
- B. electron movement
- C. plate vibration
- D. dielectric charge
- Correct Answer: Option A
In a capacitor, the electric charge is stored in
- A. metal plates
- B. dielectric
- C. dielectric as well as metal plates
- D. neither dielectric nor metal plates
- Correct Answer: Option B
A circuit component that opposes the change in the circuit voltage is
- A. resistance
- B. inductance
- C. capacitance
- D. none of these
- Correct Answer: Option C
A capacitance C is changed through a resistance R. The time constant of the charging circuit is given by
- A. RC
- B. 1/RC
- C. C/R
- D. R/C
- Correct Answer: Option A
If the medium of a parallel-plate capacitor consists of mica and air, the capacitance is increases by
- A. increasing the air space
- B. increasing the area of the plates
- C. decreasing the area of the plates
- D. increasing the thickness of mica
- Correct Answer: Option B
If a dielectric is placed in a electric field, the field strength
- A. decreases
- B. increases
- C. remains the same
- D. becomes zero
- Correct Answer: Option A
One farad is
- A. coulomb-joule
- B. one coulomb per volt
- C. joule per volt
- D. one volt per coulomb
- Correct Answer: Option B
The power dissipated in a pure capacitor is
- A. maximum
- B. minimum
- C. zero
- D. depends on the size and voltage
- Correct Answer: Option C
A sphere of one meter radius can attain a maximum potential of
- A. 1000 V
- B. 3 million volts
- C. 30 kV
- D. 3 kV
- Correct Answer: Option D