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A coil having an area 2m^(2) is placed i...

A coil having an area `2m^(2)` is placed in a magnetic field which changes from `1 Wb//m^(2)` to `4Wb//m^(2)` in an interval of `2` second. The average e.m.f. induced in the coil will be

A

4 volts/m

B

3 V

C

1.5 V

D

2 V

Text Solution

Verified by Experts

The correct Answer is:
B
`e=A(dB)/(dt)`
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NARAYNA-ELECTROMAGNETIC INDUCTION-EXERCISE-1 (H.W)
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  13. A coil has an inductance of 0.05 H and 100 turns and 0.02 A current i...

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  14. A current of 2A is increasing at a rate of 4A//s through a coil of ind...

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  15. The current decays from 5A to 2A in 0.01 s in a coil. The emf induced ...

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  16. A varying current in a coil change from 10A to 0A in 0.5 sec. If the a...

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  17. An air cored solenoid is of length 0.3 m, area of cross section 1.2 xx...

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  18. A solenoid of length 50 cm with 20 turns per cm and area of cross sect...

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  19. The current in a coil is changed from 5A to 10 A in 10^(-2) s. An emf ...

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  20. A small square loop of wire of side l is placed inside a large square ...

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