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Two identical magnets are allowed to fall freely through a horizontal ring with cut (P) and a horizontal closed ring (Q) along their axes as shown. If the velocity acquired by the magnet in 2s in these cases are $V_{P}$ and $V_{Q}$ respectively then

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$V_{P} > V_{Q}$

$V_{P} = V_{Q}$

$V_{P} \neq O, V_{Q} = O$

$V_{P} < V_{Q}$

answer is D.

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Detailed Solution

In case of ring with cut emf is induced, but no induced current $\Rightarrow$ a=g. In case of closed ring due to repulsive magnetic force by induced current, magnet falls with a<g $\Rightarrow$ V_P>V_Q

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