A loop of flexible conducting wire lies in a magnetic field of 2.0 ~T with its plane perpendicular to the field. The length of the wire is 1 ~m . When a current of 1.1 ~A is passed through the loop, it opens into a circle, then the tension

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A loop of flexible conducting wire lies in a magnetic field of 2.0 ~T with its plane perpendicular to the field. The length of the wire is 1 ~m . When a current of 1.1 ~A is passed through the loop, it opens into a circle, then the tension developed in the wire is

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Correct answer: C. 0.35 N

Let the tension developed is T . Let radius of loop be r . For smaller element aligned & BI ( d l)=2 ~T ( d 2 ) & BI (r ~d )=2 ~T ( d 2 ) aligned is small T =i r ~B = i l B 2 = 1.1 1 2.0 2 3.14 =0.35 ~N

A loop of flexible conducting wire lies in a magnetic field of 2.0 ~T with its plane perpendicular to the field. The length of the wire is 1 ~m . When a current of 1.1 ~A is passed through the loop, it opens into a circle, then the tension developed in the wire is

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