A square, single-turn wire coil L = 1.81 cm on a side is placed inside a solenoi

Question

A square, single-turn wire coil L = 1.81 cm on a side is placed inside a solenoid that has a circular cross section of radius r = 3.12 cm, as shown in the figure below. The solenoid is 19.3 cm long and wound with 132 turns of wire. If the current in the solenoid is 2.72 A, find the flux through the coil Submit Answer Incorrect. Tries 9/10 Previous Tries If the current in the solenoid is reduced to zero in 2.53 s, calculate the magnitude of the average induced emf in the coil Submit Answer Tries 0/10

Explanation / Answer

B = u0NI / L

B = 4? *10-7 * 132 * 2.72 / 0.193

B = 2.338e-3

Flux = B.A

Flux = 2.338e-3*0.0181*0.0181

Flux = 7.659e-7

Part b

Emf = dflux / dt

= 7.659e-7 / 2.53

= 3.027e-7 volts

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