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Electrostatic and Capacitance

Electrostatic and Capacitance
Voltage applied across a ceramic dielectric produces an electrolytic field 100 times greater than air. What will be the value of dielectric constant ?

300 times
150 times
50 times
100 times

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Electrostatic and Capacitance
A sine wave voltage is applied across a capacitor. When the frequency of the voltage is decreased, the current

Remains constant
Increases
Ceases
Decreases

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Electrostatic and Capacitance
A capacitor of 2,000 pF is greater than

0.0000002 F
0.02 µF
0.0002 µF
0.002 µF

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Electrostatic and Capacitance
A single core cable used on 33000 V has conductor diameter 10 mm and the internal diameter of sheath 25 mm. The maximum electrostatic stress in the cable is

82 x 105 V/m
62 x 105 V/m
92 x 105 V/m
72 x 105 V/m

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Electrostatic and Capacitance
Which of the following expression is correct for electric field strength ?

E = jtD
E = D2/t
None of the listed here
E = D/€

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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

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

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