A uniform constant magnetic field B is directed at an angle 45o to the x-axis in the xy plane. PQRS is a rigid square frame carrying a constant current Io, with its centre at origin O. At time t=0, the frame is at rest in the position shown in figure with its sides parallel to X & Y axes. The sides of the square has length L. The torque →τ about O acting on the frame will be:(Given, the coil has single turn)

A uniform constant magnetic field B is directed at an angle 45o to the

1.	A uniform constant magnetic field B is directed at an angle 45o to the x-axis in the xy plane. PQRS is a rigid square frame carrying a constant current Io, with its centre at origin O. At time t=0, the frame is at rest in the position shown in figure with its sides parallel to X & Y axes. The sides of the square has length L. The torque →τ about O acting on the frame will be:(Given, the coil has single turn)
Answer» A uniform constant magnetic field $B$ is directed at an angle $45^{o}$ to the $x$ -axis in the $x y$ plane. $PQRS$ is a rigid square frame carrying a constant current $I_{o}$ , with its centre at origin $O$ . At time $t = 0$ , the frame is at rest in the position shown in figure with its sides parallel to $X$ & $Y$ axes. The sides of the square has length $L$ . The torque $\to τ$ about $O$ acting on the frame will be: (Given, the coil has single turn)

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