A long solenoid of radius R  carries a time ( t )  dependent current  I ( t ) = I 0 t ( 1 - t ) . A ring of radius 2 R  is placed cordially near its middle. During the time internal 0 t 1  , the induced current I R  and the induced E M F ? V R  in the ring changes as:

Option 1 -

At t = 0.25  direction of I R  reverses and V R  is maximum.

Option 2 -

Direction of I R  remains unchanged and V R  is zero at t = 0.25

Option 3 -

Direction of I R  remains unchanged and V R  is maximum at t = 0.5

Option 4 -

At t = 0.5  direction of I R  reverses and V R is zero.

0 2 Views | Posted 2 months ago
Asked by Shiksha User

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    Answered by

    Vishal Baghel | Contributor-Level 10

    2 months ago
    Correct Option - 4


    Detailed Solution:

      I = I 0 t - I 0 t 2

    ? = B A

    ? = μ 0 n I A

    V R = d ? d t = - μ 0 n A l 0 ( 1 - 2 t )

    V R = 0 at   t = 1 2 and I R = V R   Resistance of loop  

     

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