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Question

The current flowing through resistance R if the rod MN moves toward left and the rod M′N′ moves toward the right is
224658_0c81a772ebd44141abdc2884191d059c.png

A
BlvR+(r/2)
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B
2BlvR+r
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C
zero
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D
3Blv2(R+r)
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Solution

The correct option is C zero
he EMF induced by moving one slider
|E|=BvL
If both of them in the opposite direction
Eeq=EE=0
i=0
374472_224658_ans_4f85a77878df46bfbe0215edba7b097a.png

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