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.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
- is attracted towards the wire
- is repelled away from the wire
- will rotate about an axis parallel to the wire
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Solution
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Force on rectangular loop wil be = i(→l×→B)
So, force on part AD will be towards wire and force on part BC will be away from wire, But at AD, →B is grater in magnitude because →B due to streight wire is μ0i2πr So, as r increases →B decreases So, force on AD is grater than on BC. So, loop is attracted towards the wire.
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