(a) Draw magnetic field lines of a bar magnet. "Two magnetic field lines never intersect each other." Why?

(b) An electric oven of $1.5\text{ kW}$ is operated in a domestic circuit ($220\text{ V}$) that has a current rating of $5\text{ A}$. What result do you expect in this case? Explain.

(a) The magnetic field lines of a bar magnet are shown in the figure below. The magnetic field lines emerge from the north pole and enter the south pole. The magnetic field lines never intersect each other because if they did, it would mean that at the point of intersection, the compass needle would point towards two directions, which is not possible. (b) The electric oven of 1.5 kW is operated in a domestic circuit (220 V) that has a current rating of 5 A. The power consumed by the oven is given by P = VI, where V is the voltage and I is the current. Since the current rating of the circuit is 5 A, the maximum power that can be consumed by the oven is P = 220 x 5 = 1100 W. However, the oven consumes 1.5 kW = 1500 W, which is more than the maximum power that the circuit can supply. Therefore, we expect the circuit to trip or the oven to not function properly.