InterviewSolution
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InterviewSolution
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(a) Two straight long parallel conductors carry currents `I_(1)` and `I_(2)` in the same direction. Deduce the expression for the firce per unit length between them. Depict the pattern of magnetic field lines around them. (b) A rectangular current carrying loop EFGH is kept in a uniform magnetic field as shown in the figure. (i) What is the direction of the magnetic moment of the current loop ? (ii) What is the torque acting on the loop (A) maximum, (B) zero ? |
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Answer» (b) (i) Magnetic moment will be out of the plane from the surface HEFG. (ii) Torque `=vec(M)xxvec(B)` (A) Torque is maximum when `vec(M)||vec(B)` i.e., when it gets rotated by `90^(@)`. (B) Torque is minimum when `vec(M)` and `vec(B)` are at `270^(@)` to each other. |
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