(a) What is the effect of the north pole of the bar magnet on the compass needle in Figure 27.11a?

(b) What is the combined effect of the bar magnet's north and south poles on the needle?

(c) A compass placed in the position shown in Figure \(27.11 b\) aligns itself in the direction indicated. What is the direction of the vector sum of the forces exerted by the bar magnet's north and south poles on the north pole of the needle? On the south pole of the needle?

Transcribed Image Text:

Figure 27.11 Effect of a bar magnet on a compass needle. (a) Forces exerted by magnet on poles of compass needle cause a torque. S F N (b) North pole of compass needle points toward south pole of magnet S N