Instantaneous displacement current of 2.0 A2.0 A is set up in the space between two parallel plates of 1 μF1 μF capacitor. The rate of change in potential difference across the capacitor is:
1. 3×106 V/s
2. 4×106 V/s
3. 2×106 V/s
4. None of these
The S.I. unit of displacement current is:
1. Henry
2. Coulomb
3. Ampere
4. Farad
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 |
The charge of a parallel plate capacitor is varying as; q=q0sinωt. The magnitude of displacement current through the capacitor is:
(the plate Area = A, separation of plates = d)
1. q0cos(ωt)
2. q0ωsinωt
3. q0ωcosωt
4. q0Aωdcosωt
A larger parallel plate capacitor, whose plates have an area of 1 m2, separated from each other by 1 mm, is being charged at a rate of 25.8 V/s. If the plates have a dielectric constant 10, then the displacement current at this instant is:
1. 25 μA
2. 11 μA
3. 2.2 μA
4. 1.1 μA
The figure shows a parallel plate capacitor being charged by a battery. If X and Y are two closed curves then during charging, ∮→B.d→l is zero along the curve:
1. X only
2. Y only
3. Both X & Y
4. Neither X nor Y
1. | 36.6 m | 2. | 40.5 m |
3. | 42.3 m | 4. | 50.9 m |
Out of the following options which one can be used to produce a propagating electromagnetic wave?
1. | a stationary charge. |
2. | a chargeless particle. |
3. | an accelerating charge. |
4. | a charge moving at constant velocity. |