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Electrostatics - Interview Questions and Answers

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46. The electric field intensity at a point situated 4 metres from a point charge is 200 N/C. If the distance is reduced to 2 metres, the field intensity will be
A. 400 N/C
B. 600 N/C
C. 800 N/C
D. 1200 N/C
Explanation:
47. While testing a capacitor with ohm-metre, if the capacitor shows charging, but the final resistance reading is appreciably less than normal, it can be concluded that the capacitor is
A. short-circuited
B. open circuited
C. alright
D. leaky
Explanation:
48. When 4 volts e.m.f. is applied across a 1 farad capacitor, it will store energy of
A. 2 joules
B. 4 joules
C. 6 joules
D. 8 joules
Explanation:
49. The sparking between two electrical contacts can be reduced by inserting a
A. capacitor in parallel with contacts
B. capacitor in series with each contact
C. resistance in line
D. none of the above
Explanation:
50. In a capacitive circuit
A. a steady value of applied voltage causes discharge
B. an increase in applied voltage makes a capacitor charge
C. decrease in applied voltage makes a capacitor charge
D. none of the above
Explanation:
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