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Electrostatic and Capacitance

Electrostatic and Capacitance
When the voltage across a capacitor is tripled, the stored charge

Triples
Is cut to one-third
Doubles
Stays the same

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Electrostatic and Capacitance
The electrostatic force between two charges of one coulomb each and placed at a distance of 0.5 m will be

36 x 109 N
36 x 108 N
36 x 10 fa
36 x 107 N

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Electrostatic and Capacitance
Dielectric strength of mica is

10 to 20 kV/mm
50 to 200 kV/mm
30 to 50 kV/mm
300 to 500 kV/mm

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Electrostatic and Capacitance
Which of the following capacitors has relatively shorter shelf life ?

Ceramic
Mica
Paper
Electrolytic

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Electrostatic and Capacitance
A 0.01 µF capacitor equals how many picofarads?

1,000 pF
100 pF
10,000 pF
100,000 pF

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Electrostatic and Capacitance
Two 0.68 µF capacitors are connected in series across a 10 kHz sine wave signal source. The total capacitive reactance is

4.68 Ω
23.41 Ω
11.70 Ω
46.8 Ω

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