This diagram shows a square coil about to enter a region of uniform magnetic field of magnetic flux density 0.30 T. The magnetic field is at right angles to the plane of the coil. The coil has 150 turns and each side is 2.0 cm in length. The coil moves at a constant speed of 0.50 m s⁻¹.

a. i. Calculate the time taken for the coil to completely enter the region of magnetic field.
ii. Determine the magnetic flux linkage through the coil when it is all within the region of magnetic field.
b. Explain why the magnitude of the induced e.m.f. is constant while the coil is entering the magnetic field.
c. Use your answer to part a to determine the induced e.m.f. across the ends of the coil.
d. Explain the induced e.m.f. across the ends of the coil when it is completely within the magnetic field.
e. Sketch a graph to show the variation of the induced e.m.f. with time from the instant that the coil enters the magnetic field. Your time axis should go from 0 to 0.08 s.

Transcribed Image Text:

2.0 cm 2.0 cm 0.50 m s-1 coil with 150 turns uniform magnetic field (into plane of paper) Figure 26.31