(Solved):   4. A rectangular coil consists of \( N=100 \) closely wrapped turns and has dimensions \( ...

 

4. A rectangular coil consists of \( N=100 \) closely wrapped turns and has dimensions \( a= \) \( 0.400 \mathrm{~m} \) and \( b=0.300 \mathrm{~m} \). The coil is hinged along the \( y \) axis, and its plane makes an angle \( \theta=30.0^{\circ} \) with the \( x \) axis (Fig. P29.23). What is the magnitude of the torque exerted on the coil by a uniform magnetic field \( B=0.800 \mathrm{~T} \) directed along the \( x \) axis when the current is \( I=1.20 \mathrm{~A} \) in the direction shown? What is the expected direction of rotation of the coil? Magnetic fields