Instantaneous displacement current of 2.0 A is set up in the space between two parallel plates of \(1~\mu F\) capacitor. The rate of change in potential difference across the capacitor is:
1.
2.
3.
4. None of these
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The S.I. unit of displacement current is:
1. Henry
2. Coulomb
3. Ampere
4. Farad
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A capacitor is having a capacity of 2 pF. The electric potential across the capacitor is changing with a value of \(10^{12}~\mathrm{V/s}\). The displacement current is:
1. | 2 A | 2. | 3 A |
3. | 6 A | 4. | 9 A |
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A variable frequency AC source is connected to a capacitor. Then on increasing the frequency:
1. | Both conduction current and displacement current will increase |
2. | Both conduction current and displacement current will decrease |
3. | Conduction current will increase and displacement current will decrease |
4. | Conduction current will decrease and displacement current will increase |
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The charge of a parallel plate capacitor is varying as . Find the magnitude of displacement current through the capacitor.
(Plate Area = A, separation of plates = d)
1.
2.
3.
4.
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A larger parallel plate capacitor, whose plates have an area of 1 , separated from each other by 1 mm, is being charged at a rate of 25.8 V/s. If the plates have dielectric constant 10, then the displacement current at this instant is:
1. 25
2. 11
3. 2.2
4. 1.1
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The maxwell's equation:
is a statement of :
1. | Faraday's law of induction |
2. | Modified Ampere's law |
3. | Gauss's law of electricity |
4. | Gauss's law of magnetism |
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The figure shows a parallel plate capacitor being charged by a battery. If X and Y are two closed curves then during charging, is zero along the curve:
1. | X only |
2. | Y only |
3. | Both X & Y |
4. | Neither X nor Y |
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If a source is transmitting an electromagnetic wave of frequency , then the wavelength of the electromagnetic wave transmitted from the source will be:
1. | 36.6 m | 2. | 40.5 m |
3. | 42.3 m | 4. | 50.9 m |
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Out of the following options which one can be used to produce a propagating electromagnetic wave?
1. | a stationary charge |
2. | a charge-less particle |
3. | an accelerating charge |
4. | a charge moving at constant velocity |
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