1. The problem statement, all variables and given/known data 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 = 2.1 A at t = t1 = 14 s, remains constant at this value until t = t2 when it decreases linearly to a value I4 = -2.1 A at t = t4 = 24 s, passing through zero at t = t3 = 21.5 s. A conducting loop with sides W = 20 cm and L = 57 cm is fixed in the x-y plane at a distance d = 49 cm from the wire as shown. What is ε1, the induced emf in the loop at time t = 7 s? Define the emf to be positive if the induced current in the loop is clockwise and negative if the current is counter-clockwise. 2. Relevant equations B = μI/2∏r Flux = B*A -dflux/dt = ε 3. The attempt at a solution I don't understand what I'm doing wrong with this problem. This is what I have so far... (dB*A)/dt= ε, A = L(W) μ(dI)(L)W/(2∏rdt) = ε μ=12.566*10^-7 dI = 2.1 A L = .57 m W = .2 m dt=14 s. On the left side of the box, r = .49 m and the current is negative, so the emf is positive. On the right side of the box, r = 1.06 m and the current is positive, so the emf is negative. Putting the 2 emf's together by subtracting the right side from the left side, I get an emf of -3.753*10^-9V. What am I doing wrong?