Please answer as many questions as possible 1. The coil has a radius of 5 cm and

Question

Please answer as many questions as possible

1. The coil has a radius of 5 cm and 30 turns. While moving the magnet closer towards the coil, at a certain point in time, the voltage meter shows -370 mV. What is the magnitude of the rate of change of the flux through the coil?

2. You are given 45.000 cm of copper wire with diameter 4.5000 mm. It is formed into a circular loop and placed perpendicular to a uniform magnetic field that is increasing with time at a constant rate of 27.400 mT/s. At what rate is thermal energy generated in the loop?
The resistivity of copper is 1.690×10-8Ohm.m

3. A 7.30 cm diameter wire coil is initially oriented so that its plane is perpendicular to a magnetic field of 0.560 T pointing up. During the course of 0.140 s, the field is changed to one of 0.200 T pointing down. What is the average induced emf in the coil?

4. A 30.9 cm diameter coil consists of 25 turns of circular copper wire 2.00 mm in diameter. A uniform magnetic field, perpendicular to the plane of the coil, changes at a rate of 8.40E-3 T/s. Determine the current in the loop.

Part B - Determine the rate at which thermal energy is produced.

5. The magnetic field perpendicular to a single 11.8 cm diameter circular loop of copper wire decreases uniformly from 0.800 T to zero. If the wire is 2.26 mm in diameter, how much charge moves past a point in the coil during this operation?

Explanation / Answer

I am solving first question,

1.

By Faraday’s law,

e = -N*d/dt

Where e= emf generated, N= no. of turns, d/dt = change in magnetic flux

d/dt= - e/N = -(-0.370V)/30 = 0.0123 T/s

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