Question

The force on differential length dl at point P in the conducting circular loop in
Figure 8.33 is
(a) Outward along OP
(b) Inward along OP
(c) In the direction of the magnetic field
(d) Tangential to the loop at P

Answer 1

The force on the current element of dL at P is given by

$\bar{F} = i(d \bar{L} \times \bar{B})$

$d \bar{L} \times \bar{B}$ will be in outward direction along OP (By right hand screw rule).

Answer: (a) Outward along OP