Displacement Current
Trending Questions
Q.
What is the electric flux through the surface S in vacuum?
Q. In the figure shown, the final charge on the capacitors of capacitance 2C and 3C are respectively.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1253616/original_2Q.png)
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1253616/original_2Q.png)
- 8CV5, 4CV5
- 8CV5, 12CV5
- 8CV3, 12CV5
- 8CV3, 7CV5
Q. Given below are two statements.
Statement I : A cyclotron is a device which is used to accelerate a charged particle.
Statement II: Cyclotron frequency depends upon the velocity.
Select the correct option.
Statement I : A cyclotron is a device which is used to accelerate a charged particle.
Statement II: Cyclotron frequency depends upon the velocity.
Select the correct option.
- Statements I and II are true, and Statement II is not the correct explanation for Statement I
- Statements I and II are true, and Statement II is the correct explanation for Statement I
- Statement I is true, but Statement II is false
- Statement I is false, but Statement II is true
Q. A point charge q moves with velocity v along a straight line. Displacement current density at a point located at a distance r from charge and in the line of motion of the charge will be
- qv24πr2
- qvr3
- qv4πr3
- qv2πr3
Q. Figure represents a capacitor made of two circular plates each of radius r=12 cm and separated by d=5.0 mm. The capacitor is being charged by an external source. The charging current is constant current, I=0.15 A.
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/613083/original_Q12.PNG)
Calculate the rate of change of electric field between the plates.
Calculate the rate of change of electric field between the plates.
- 3.14×1011Vm−1s−1
- 2.68×1011Vm−1s−1
- 1.87×1011Vm−1s−1
- 5.12×1011Vm−1s−1
Q. In an inductor of self inductance L = 3 mH, current changes with time according to the relation I = 2t^2 e^(–t). Time when induced emf will be zero, is
Q. A parallel-plate capacitor with plate area A and separation between the plates d is charged by a constant current i. Consider a plane surface of area A2 parallel to the plates and drawn symmetrically between the plates. Find the displacement current through this area.
- i3
- i2
- i
- i5
Q. A parallel plate capacitor made of circular plates each of radius R=6.0 cm has a capacitance C=100 pF. The capacitor is connected to a 230 V AC supply with an angular frequency of 300 rad/s. The displacement current is -
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1427721/original_2.png)
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1427721/original_2.png)
- 7.8 μA
- 6.9 μA
- 7.2 μA
- 6.1 μA
Q. Electric field →E=4t ^i exists in space. Displacement current associated with a square of side a = 2cm with its plane perpendicular to →ε at t = 2 sec will be
- 28×10−15A
- 112×10−15A
- 14×10−15A
- 7×10−15A
Q. Figure represents a capacitor made of two circular plates each of radius r=12 cm and separated by d=5.0 mm. The capacitor is being charged by an external source. The charging current is constant current, I=0.15 A.
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/613083/original_Q12.PNG)
Calculate the rate of change of electric field between the plates.
Calculate the rate of change of electric field between the plates.
- 3.14×1011Vm−1s−1
- 2.68×1011Vm−1s−1
- 1.87×1011Vm−1s−1
- 5.12×1011Vm−1s−1
Q. A 100 Ω resistance and a capacitor of 100 Ω reactance are connected in series across a 220 V source. When the capacitor is 50% charged, the peak value of the displacement current is
- 4.4 A
- 11 √2 A
- 2.2 A
- 11 A