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:

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Subtopic: Â Motional emf |
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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: Â Motional emf |
Â 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: Â Motional emf |
Â 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: Â Motional emf |
Â 66%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh