As shown in the figure below, a coil that is square, has 30 turns, is 0.82 ?, an

Question

As shown in the figure below, a coil that is square, has 30 turns, is 0.82 ?, and is 14.0 cm on a side is between the poles of a large electromagnet that produces a constant, uniform magnetic field of 0.5 T directed into the page. As suggested by the figure, the field drops sharply to zero at the edges of the magnet. The coil moves to the right at a constant velocity of 3.00 cm/s. What is the current through the coil wire in the following instances?

(a) before the coil reaches the edge of the field
A

(b) while the coil is leaving the field
A

(c) after the coil leaves the field
A

(d) What is the total charge that flows past a given point in the coil as it leaves the field?
C

Explanation / Answer

A.

0 A, as there is no change in magnetic flux there.
***********************

B.

Here,

I = B v s n / R

Thus,

I = 0.07683 A [ANSWER]

*********************

C.

Again, it is 0 A, as there is no change in magnetic flux there.

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