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Motional EMF

A straight li...

Question

A straight line conductor of length $0.4 m$ is moved with a speed of $7 m s^{- 1}$ perpendicular to magnetic field of intensity of $0.9 W b m^{- 2} .$ The induced emf across the conductor is :

A

25.2 V

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B

5.04 V

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C

2.52 V

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D

1.26 V

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Solution

The correct option is D $2.52 V$
The induced emf across the conductor $E = B l v$
$= 0.9 \times 0.4 \times 7 = 2.52 V$

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