The figure shows a 22-cm-diameter loop in three different magnetic fields. The l
ID: 1347365 • 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
Explanation / Answer
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