Q.

A uniform magnetic field exists in the region given by B=3i^+4j^+5k^. A rod of length 5 m is placed along y-axis is moved along x-axis with constant speed 1 m/s. Then induced e.m.f. in the rod will be

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a

zero

b

20 volt

c

15 volt

d

25 volt

answer is B.

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Detailed Solution

Given,B=3+4+5k
V=1 m/s (As the rod moves in X−Direction)
Length of rod = 5m
Since,e=−dϕ/dt and ϕ=B.A
 

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