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A uniform magnetic field of 3000G is established along the positive z-direction. A rect angular loop of sides 10 cm and 5 cm carries a current of 12A. What is the torque on the loop in different cases shown in the figure? What is the force on each case? Which case corresponds to stable equilibrium? |
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Answer» Solution :`tau = 1 ( vec A x vec B)` In fig. a.`1.8 xx 10^(-2)` Nm along -y DIRECTION In figa. B. same as in (a) In fig. C `1.8 xx 10^(-2)` Nm along -=x direction. In fig d.`1.8 xx 10^(-2)` Nm t an angle of `240^@` along the x diarection. In e and f the TORQUE is zero. FORCE is zero in each case. Fig e. corresponds to stable equilibrium . |
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