Question

A circular coil 20.0 cm in radius and composed of 145 tightly wound turns carries a current of 2.60 A in the counterclockwise direction, where the plane of the coil makes an angle of 15.0° with the y axis (see figure below). The coil is free to rotate about the z axis and is placed in a region with a uniform magnetic field given by B = 1.30 ſ T. 1 B y A = 15.0° (a) What is the magnitude of the magnetic torque on the coil? N: . m (b) In what direction will the coil rotate? clockwise as seen from the +z axis counterclockwise as seen from the +z axis

Answer 1

M = magnetic moment = 145x 2.60 8 TI X (20)2 47.375 A-m² Ni B - M X B 0-190459) = 105° - MB sino M X x = 47.375X1030 Sin 105 Ŕ 59. 4889 N.m Answa A b) counter clock wise as xen from the zaxis