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A 10 m long horizontal wire extends from...

A 10 m long horizontal wire extends from North east ro South East. It is falling with a speed of `5.0 ms^(-1)`, at right angles to the horizontal component of the earth's magnetic field, of `0.3xx10^(-4)Wb//m^(2)`. The value of the induced emf in wire is :

A

`1.5 xx 10^(-3)V`

B

`1.1 xx 10^(-3) V`

C

`0.3 xx 10^(-3) V`

D

`2.5 xx 10^(-3)V`

Text Solution

Verified by Experts

The correct Answer is:
B
emf = Blv
B = magnetic field perpendicular to wire.
`E_(eq) = (0.3 xx 10^(-4) xx (1)/(sqrt(2))) 10 xx 5 = 10.6 xx 10^(-4) V`
Most probable answer is (2)
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