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The magnitude of the induced emf in a co...

The magnitude of the induced emf in a coil of inductance 30 mH in which the current changes from 6A to 2A in sec is

A

0..6V

B

0.6V

C

1.06V

D

6V

Text Solution

Verified by Experts

The correct Answer is:
A
Induced emf ,`E=-L(dI)/(dt)`
`30xx10^(-3)xx(6-2)/(2)=6xx10^(-2)V`
=`0.06V`
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Knowledge Check

  • The magnitude of the induced emf in a coil of inductance 30 mH in which the current changes from 6A to 2A in 2s is

    A
    0.06 V
    B
    0.6 V
    C
    1.06 V
    D
    6 V

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    B
    5H
    C
    5000H
    D
    5 mH

  • An e.m.f of 5 volt is produced by a self inductance, when the current changes at a steady rate from 3A to 2A in 1 millisecond. The value of self inductance is

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    B
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    5000H
    D
    5mH

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