The figure shows a 22-cm-diameter loop in three different magnetic fields. The l

ID: 1367584 • Letter: T

Question

The figure shows a 22-cm-diameter loop in three different magnetic fields. The loop's resistance is 0.19 ?

#1.In (Figure 1) , what are the size and direction of the induced current?

#2.

a. There is no induced current?

b. The loop current direction is cw.

c. The loop current direction is ccw.

#3.In (Figure 2) , what are the size and direction of the induced current?

#4.

a. The loop current direction is cw?

b. The loop current direction is ccw?

c. There is no induced current.

#5.In (Figure 3) , what are the size and direction of the induced current?

#6.

a. There is no induced current

b. Out at top, in at bottom

c. In at top, out at bottom

The induced emf = -B/t*A

a) emf = 0.5 * pie *0.11^2 = 0.01897V
i = V / R = 0.01897 / 0.19 = 99.8 *10^-3 amp

the direction is clockwise

b) emf = 0.5 * pie *0.11^2 = 0.01897 V

i = V / R = 0.01897 / 0.19 = 99.8 * 10^-3 amp

the direction is clockwise

c)

Flux is zero so emf = 0 and i = 0

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