1) What is the magnitude of the magnetic flux through the loop at time t = t 1 =
ID: 1453551 • Letter: 1
Question
1)
What is the magnitude of the magnetic flux through the loop at time t = t1 = 11 s?
2)
What is 1, the induced emf in the loop at time t = 5.5 s? Define the emf to be positive if the induced current in the loop is clockwise and negative if the current is counter-clockwise.
3)
What is 2, the induced emf in the loop at time t = 13 s? Define the emf to be positive if the induced current in the loop is clockwise and negative if the current is counter-clockwise.
5)
What is 4, the induced emf in the loop at time t = 26.5 s? Define the emf to be positive if the induced current in the loop is clockwise and negative if the current is counter-clockwise.
Explanation / Answer
1) = [(uo*I*W)/2pi]*ln[(d+L)/d]
= (2*10^-7*4.9*0.30)*ln(0.92/0.33) = 3.01*10^-7 T-m^2
2) E1 = (uo*W/2pi)*ln[(d+L)/d]*(dI/dt) = (2*10^-7*0.3)*ln(0.92/0.33)*(4.9/11) = 2.74*10^-8
3) E2 = 0 (induced current will be clockwise)
5) E4 = d /dt = (d/dt)[(uo*I*W)/2pi]*ln[(d+L)/d]
= (2*10^-7*0.3)*ln(0.92/0.33)*(4.9/26.5) = 1.14*10^-8
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