A rectangular loop is placed near a current carrying straight wire as shown in figure. If the loop is rotated about an axis passing through one of its sides, find the direction of induced current in the loop.

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Solution

Magnetic lines around the straight wire are circular. So, same magnetic lines will pass through loop under all conditions.
$Δ ϕ = 0$ $\Rightarrow$ $e m f = 0$ $\Rightarrow$ $i = 0$

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