Question

A thin coil has 60 circular turns of wire of radius 4 cm. The current in the wire is 8 amperes. (a) What is the magnetic dipole moment of this coil? (b) At a distance of 40 cm from the center of the coil, along the axis of the coil, what is the approximate magnitude of the magnetic field contributed by the coil? The coil is placed with its axis along the x axis. A bar magnet whose magnetic dipole moment is the same as that of the coil is also placed on the x axis, oriented in the y direction as shown. Conventional current runs in the +y direction in the upper wires of the coil (if you look at the coil from the location of the bar magnet, conventional current runs counterclockwise) coil (c) At the location marked x, halfway between the coil and the bar magnet, draw the magnetic field contributed by the coil, and label this arrow Всой- (d) At the location marked x, draw the magnetic field contributed by the bar magnet. Draw the arrows using the same scale (so if one vector has a larger magnitude than another, its arrow should be drawn longer than the other arrow). Label this arrow Bmagne

Answer 1