.A rectangular loop carrying current I is located near an infinite long straight conductor carrying current I as shown in the figure. The loop,

remain stationary

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is attracted towards the wire

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is repelled away from the wire

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will rotate about an axis parallel to the wire

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Solution

The correct option is B is attracted towards the wire
Force on rectangular loop wil be = $i (\to l \times \to B)$
So, force on part AD will be towards wire and force on part BC will be away from wire, But at AD, $\to B$ is grater in magnitude because $\to B$ due to streight wire is $\frac{μ_{0} i}{2 π r}$ So, as r increases $\to B$ decreases So, force on AD is grater than on BC. So, loop is attracted towards the wire.

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