Question $2$

a$)$ A coil is wound on a rectangular form of width $24$ mm and length $30$ mm $.$ The form is pivoted about an axis passing through the middle of the two shorter sides and is placed in a uniform magnetic field of flux density of $0\mathrm{.}8$ T $,$ the axis being perpendicular to the field. If the coil carries a current of $50$ mA $,$ determine the force on each coil side.

i$)$ For a single$-$turn coil.

ii$)$ For a coil wound with $300$ turns.

b$)$ Using superposition, find the current $I_L$ for the network of Fig. Q$2.$b

Fig. Q$2.$b Circuit for Q$2.$b

Total Marks $[25]$