A conducting rod is rotated in a plane perpendicular to a uniform magnetic field with constant angular velocity. The correct graph between the induced emf \((e)\) across the rod and time \((t)\) is:

1. 2.
3. 4.
Subtopic:  Motional emf |
 53%
From NCERT
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
 

Assertion (A): When a piece of non-metal and a metal are dropped from the same height near the surface of the earth, the non-metallic piece will reach the ground first.
Reason (R): Induced current in metal will decrease the acceleration.


In the light of the above statements choose the correct answer from the options given below:
 

1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.

Subtopic:  Motional emf |
 84%
From NCERT
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
 
Assertion (A):  The induced electric field is non-conservative.
Reason (R): Work done in a closed path in the induced electric field is non-zero.

In the light of the above statements choose the correct answer from the options given below:
 
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.

Subtopic:  Motional emf |
 72%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):

A rectangular loop of resistance R is placed in a region where there is a magnetic field B, passing perpendicularly through the plane of the loop, as shown in the figure. The loop is pulled with a constant velocity v so that it is partially within the field.
                                          
 
Assertion (A): An external force F is needed to be applied in the direction of the velocity v so that the loop can move with constant velocity v.
Reason (R): As the loop moves towards the right, the magnetic flux decreases inducing an emf and a corresponding current. This current causes a retarding force to be exerted on the wire.
In the light of the above statements choose the correct answer from the options given below:
1. (A) is True but (R) is False.
2. (A) is False but (R) is True.
3. Both (A) and (R) are True and (R) is the correct explanation of (A).
4. Both (A) and (R) are True but (R) is not the correct explanation of (A).
Subtopic:  Motional emf |
 66%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh