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Electrostatic and Capacitance

Electrostatic and Capacitance
Which of the following capacitors will have the least value of breakdown voltage ?

Paper
Electrolytic
Air
Mica

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Electrostatic and Capacitance
The breakdown voltage for paper capacitors is usually

20 to 60 volts
200 to 1600 volts
2000 to 3000 volts
more than 10000 volts

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Electrostatic and Capacitance
Dielectric strength of mica is

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

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Electrostatic and Capacitance
A capacitor and a resistor are connected in series to a sine wave generator. The frequency is set so that the capacitive reactance is equal to the resistance and, thus, an equal amount of voltage appears across each component. If the frequency is increased

VR = VC
VC > VR
VR and VC = 0
VR > VC

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Electrostatic and Capacitance
Two infinite parallel plates 10 mm apart have maintained between them a potential difference of 100 V. The acceleration of an electron placed between them is

0.56 x 1015 m/s2
1.76 x 1015 m/s2
1.5 x 1015 m/s2
1.6 x 1015 m/s2

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

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