Question

A 82-mH solenoid inductor is wound on a form 0.80 m in length and 0.10 m in diameter. A coil is tightly wound around the solenoid at its center. The coil's resistance is 7.9 ohms. The mutual inductance of the coil and solenoid is 88 μH. At a given instant, the current in the solenoid is 480 mA, and is decreasing at the rate of 2.5 A/s. At the given instant, what is the magnitude of the induced current in the coil? (μ ₀ = 4π × 10^-7 T · m/A)

A 82-mH solenoid inductor is wound on a form 0.80 m in length and 0.10 m in diameter. A coil is tightly wound around the solenoid at its center. The coil's resistance is 7.9 ohms. The mutual inductance of the coil and solenoid is 88 μH. At a given instant, the current in the solenoid is 480 mA, and is decreasing at the rate of 2.5 A/s. At the given instant, what is the magnitude of the induced current in the coil? (μ ₀ = 4π × 10^-7 T · m/A)

45 μA

33 μA

28 μA

39 μA

22 μA

Answer 1