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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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17 × 10^–3wb

3 × 10^–3wb

5 × 10^–3wb

2 × 10^–3wb

answer is B.

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Detailed Solution

$ϕ = MI \frac{10^{- 2}}{ϕ^{'}} = \frac{2}{1} ϕ' = 5 \times 10^{- 3} Wb$

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