A rectangular loop with a slide wire of length l is kept in a uniform magnetic field as shown in figure (a). The resistance of slider is R. Neglecting self inductance of the loop find the current in the connector during its motion with a velocity v.
A
BlvR1+R2+R
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B
Blv(R1+R2)R(R1+R2)
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C
Blv(R1+R2)RR1+RR2+R1R2
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D
Blv(1R1+1R2+1R3)
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Solution
The correct option is BBlv(R1+R2)RR1+RR2+R1R2 The equivalent circuit is shown in figure (c). Obviously, I=BlvR+R1R2R1+R2=Blv(R1+R2)RR1+RR2+R1R2