JEE AdvancedPhysicsMagnetismNumerical+3 / −1
A long circular tube of length 10 m and radius 0.3 m carries a current I along its curved surface as shown. A wire-loop of resistance 0.005 and of radius 0.1 m is placed inside the tube with its axis coinciding with the axis of the tube. The current varies as , where I0 is constant. If the magnetic moment of the loop is , then N is . 

Numerical answer
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