1) 2) 3) 4) 5) An infinite straight wire carries a current I that varies with ti
ID: 2251163 • Letter: 1
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An infinite straight wire carries a current I that varies with time as shown above. It increases from 0 at t = 0 to a maximum value I1 = 4.9 A at t = t1 = 19 s, remains constant at this value until t = t2 when it decreases linearly to a value I4 = -4.9 A at t = t4 = 32 s, passing through zero at t = t3 = 28 s. A conducting loop with sides W = 22 cm and L = 66 cm is fixed in the x-y plane at a distance d = 41 cm from the wire as shown. 1) What is the magnitude of the magnetic flux ? through the loop at time t = t1 = 19 s? What is ?1, the induced emf in the loop at time t = 9.5 s? Define the emf to be positive if the induced current in the loop is clockwise and negative if the current is counter-clockwise. What is ?4, the induced emf in the loop at time t = 30 s? Define the emf to be positive if the induced current in the loop is clockwise and negative if the current is counter-clockwise.Explanation / Answer
1) Use the Biot-Savart for an infinitely long wire.
B = (
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