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Q.

There are two coils A and B separated by some distance. If a current of 2 A flows through A, a magnetic flux of 10–2 Wb passes through B(no current through B). If no current passes through A and a current of 1 A passes through B, what is the flux through A ?

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a

17 × 10–3wb

b

3 × 10–3wb

c

5 × 10–3wb

d

2 × 10–3wb

answer is B.

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Detailed Solution

ϕ=MI 10-2ϕ'=21 ϕ'=5×10-3 Wb 

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