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Q.

Some magnetic flux is changed from a coil of resistance 10 ohm. As a result, an induced current is developed in it, which varies with time as shown in figure. The magnitude of change in flux through the coil in webers is
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a

2

b

4

c

6

d

8

answer is A.

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Detailed Solution

  Area under i – t  graph gives the total charge flow

here dq =120.14=0.2 C

flux =R dq=100.2=2 weber
 

 

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