with aresistance of R-986) -pushed to the len a-constant \'poed At the instant s
ID: 2030113 • Letter: W
Question
with aresistance of R-986) -pushed to the len a-constant 'poed At the instant shown in the figure, the loop is partially in Chapter-22. Electromag ete fnduction byar field. An are 3.0m r the loop are 30 m and 2.0 m respectively. Determine the the resistor. The length and width of of the induceu magnitude of the induced curent I through the resistor a) as A D) 73A ED IIA indaced current 4. A magnetic field is passing through a loop of wire whose area is A 0.128 m2. The direction of the magnetic field is parallel to the normal to the loop0), and the magnitude of the field is increasing at the rate of 0.80 T/s. (a) Determine the magnitude of the emf induced in the loop. (b) Suppose the area of the loop can be enlarged or shrunk. If the magnetic field is increasing as in part (a), at what rate 64 in m'/s) should the area be changed at the instant when B -2.9 T, ifthe induced emfis to be zero (EmV)? Explain whether the area to be enlarged or shrunk?Explanation / Answer
4)
(a)
V = d(B.A ) /dt = 0.128 * 0.8 = 0.1024 V
(b)
– 0.1024 = 2.9 dA/dt
dA / dt = – 0.03531 m^2/s
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