A positive and a negative charge are initially 50 mm apart. When they are moved close together so that they are now only 10 mm apart, the force between them will be
A. 5 times smaller than before
B. 5 times greater than before
C. 10 times greater than before
D. 25 times larger than before
Answer: Option D
This Question Belongs to Electrical Engineering >> Electrostatics
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For making a capacitor, it is better to select a dielectric having
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B. high permittivity
C. permittivity same as that of air
D. permittivity slightly more than that of air
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A. zero
B. proportional to applied voltage
C. proportional to value of capacitance
D. both (B) and (C) above
A. remain uncharged
B. decrease
C. increase
D. become zero
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A. Mica
B. Paper
C. Ceramic
D. Electrolytic
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