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Electrostatic and Capacitance

Electrostatic and Capacitance
If an ohmmeter reading immediately goes practically to zero and stays there, capacitor is

Satisfactory
Short-circuited
Lossy
Charged

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Electrostatic and Capacitance
The value of dielectric constant for vacuum is taken as

2
3
0
1

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Electrostatic and Capacitance
XC is inversely proportional to frequency and capacitance.

1

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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

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

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Electrostatic and Capacitance
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

10 times greater than before
5 times smaller than before
5 times greater than before
25 times larger than before

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Electrostatic and Capacitance
In a cable capacitor, voltage gradient is maximum at the surface of the

Earth
Sheath
Insulator
Conduction

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