The S.I. unit of displacement current is:
1. Henry
2. Coulomb
3. Ampere
4. Farad
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/s3×106 V/s
2. 4×106 V/s4×106 V/s
3. 2×106 V/s2×106 V/s
4. None of these
In an electric circuit, there is a capacitor of reactance 100 Ω100 Ω connected across the source of 220 V220 V. The rms value of displacement current will be:
1. 2.2 A2.2 A
2. 0.22 A0.22 A
3. 4.2 A4.2 A
4. 2.4 A2.4 A
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=q0sinωtq=q0sinωt. The magnitude of displacement current through the capacitor is:
(the plate Area = AA, separation of plates = dd)
1. q0cos(ωt)q0cos(ωt)
2. q0ωsinωtq0ωsinωt
3. q0ωcosωtq0ωcosωt
4. q0Aωdcosωtq0Aωdcosωt
A parallel plate capacitor with plate area AA and separation between the plates dd, is charged by a source having current ii at some instant. Consider a plane surface of area A/2A/2 parallel to the plates and drawn symmetrically between the plates. The displacement current through this area is:
1. ii
2. i2i2
3. i4i4
4. i8i8
A capacitor is made of two circular plates each of radius 12 cm12 cm and separated by 5.0 cm.5.0 cm. The capacitor being charged by an external source. The charging current is constant and equal to 0.15 A.0.15 A. The displacement current across the plates is:
1. 00
2. 0.14 A0.14 A
3. 0.16 A0.16 A
4. 0.15 A0.15 A
A larger parallel plate capacitor, whose plates have an area of 1 m2,1 m2, separated from each other by 1 mm,1 mm, is being charged at a rate of 25.8 V/s.25.8 V/s. If the plates have a dielectric constant 10,10, then the displacement current at this instant is:
1. 25 μA25 μA
2. 11 μA11 μA
3. 2.2 μA2.2 μA
4. 1.1 μA1.1 μA
A parallel plate capacitor consists of two circular plates each of radius 2 cm2 cm, separated by a distance of 0.1 mm0.1 mm. If the voltage across the plates is varying at the rate of 5×1013 V/s5×1013 V/s, then the value of displacement current is:
1. 5.50 A5.50 A
2. 5.56×102 A5.56×102 A
3. 5.56×103 A5.56×103 A
4. 2.28×104 A2.28×104 A