A rectangular loop PQRS made of a uniform wire ; has a length a , width b and mass m. It is free to rotate about arm PQ which remains hinged along a horizontal line taken as Y-axis. Taking the +ve Z-axis as vertically upward direction. A uniform magnetic field B=(3^i+4^k)B0 exists in the region. The loop is held in XY-plane and a current I is passed through it. The loop is now released and found to stay in the horizontal position in equilibrium.(B0 is a constant)

A rectangular loop PQRS made of a uniform wire ; has a length a , widt

1.	A rectangular loop PQRS made of a uniform wire ; has a length a , width b and mass m. It is free to rotate about arm PQ which remains hinged along a horizontal line taken as Y-axis. Taking the +ve Z-axis as vertically upward direction. A uniform magnetic field B=(3^i+4^k)B0 exists in the region. The loop is held in XY-plane and a current I is passed through it. The loop is now released and found to stay in the horizontal position in equilibrium.(B0 is a constant)
Answer» A rectangular loop $PQRS$ made of a uniform wire ; has a length $a$ , width $b$ and mass $m$ . It is free to rotate about arm $PQ$ which remains hinged along a horizontal line taken as $Y-axis$ . Taking the $+ v e$ $Z-axis$ as vertically upward direction. A uniform magnetic field $B = (3^i + 4^k) B_{0}$ exists in the region. The loop is held in $XY-plane$ and a current $I$ is passed through it. The loop is now released and found to stay in the horizontal position in equilibrium. ( $B_{0}$ is a constant)

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