Faraday's Law MCQ Level - 1 - Physics MCQ

The correct answer is: All of the above

The correct answer is: energy

The correct answer is: None of these

If the coil is kept stationary in the uniform magnetic field, there will be no change in the magnetic flux linked with the coil. Therefore, there will be no induced emf in the coil.

Since, there is no induced emf, there will be no induced current also in the coil.

According to faraday’s Law.

If the flux of magnetic field across the coil varies with time an emf is induced in it.

The induced emf is equal to negative rate of change of magnetic flux across it.

Magnitude of induced emf = 2V, magnitude of induced current  i = 0.2 A

The correct answer is: 0.2A

According to Faraday’s law

Induced emf, 
Where flux through the coil

θ is the angle between magnetic field and unit normal to the surface.

when coil is rotated from 0° to 90° then total change in magnetic flux is given by

= 0.016 V
The correct answer is: 0.016 V

According to Faraday’s law.

The magnitude of induced emf is directly proportional to the rate of change of magnetic flux. So induced emf will be more in first case.

We also know ε = iR

So, induced charge in a coil is independent of time taken to charge the flux.
The correct answer is: more in first case/equal in both case

When the rod move in the magnetic field due to current carrying wire. The emf is induced in the rod.

Magnetic field due to current carrying wire is

So  B is farther from  A
So  B is at lower potential.
The correct answer is: Potential at A  will be higher than at  B

Let a solenoid cross-sectional area A and N  turns. We know, in case of solenoid magnetic field along the axis of solenoid is given by

Where N  is the number of turns and I  is the current flowing in the solenoid.
Flux through coil of solenoid

Total flux = number of turns × flux through one coil.

Now we know

where L  is self inductance