For each situation in Figures \(27.20a, 27.20 b\), and \(27.21 a\), reverse the polarity of the magnet and then apply the appropriate right-hand rule to determine the direction of the force exerted by the bar magnet on the current-carrying wire.

Transcribed Image Text:

Figure 27.20 The magnetic force exerted by a bar magnet on a current-carrying wire depends on the magnet's orientation. Magnetic field of bar magnet at position of wire is: (a) parallel to wire F bw perpendicular to wire (b) B B F S bw N Magnet exerts no magnetic force on wire. Magnet does exert magnetic force on wire.