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Electrostatic and Capacitance

Electrostatic and Capacitance
Which medium has the least dielectric strength ?

Glass
Air
Paraffin wax
Water

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Electrostatic and Capacitance
The electric field intensity at a point situated 4 meters from a point charge is 200 N/C. If the distance is reduced to 2 meters, the field intensity will be

1600 N/C
800 N/C
2000 N/C
1200 N/C

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Electrostatic and Capacitance
Mica capacitors are characterised by all of the following except

low leakage reactance
accurate value
stable operation
low losses

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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

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

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

1
2
0
3

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Electrostatic and Capacitance
While testing a capacitor with ohm meter, if the capacitor shows charging, but the final resistance reading is appreciably less than normal, it can be concluded that the capacitor is

Short-circuit
Open-circuit
Leaky
Alright

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