The solenoid and conducting ring shown in the figure below. The solenoid has a r

Question

The solenoid and conducting ring shown in the figure below. The solenoid has a radius of 2 cm. The conducting ring has a radius of 10 cm. The magnitude of the magnetic field is 0.5 T inside the solenoid and approximately zero outside the solenoid. Arrows indicate the directions of the magnetic field and of the current flowing in the solenoid. By adjusting the power supply connected to the solenoid you double the current flowing through the solenoid in 0.1 seconds. Estimate the emf around the large conducting ring while the current is changing. Also, in what direction does current flow in the large conducting ring while the current in the solenoid is increasing?

I calculated the magnetic flux through the large conducting ring. = 6.28 x 10^-4 (Tm^2)

Explanation / Answer

induced emf e = flux /dt

e=6.28 *10^-4/0.1

e= 6.28 mV

direcrtion is along the circurmference of the coil.

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