A coil enclosing an area of 100cm^2 is made of 200 turns of copper wire. Initial

Question

A coil enclosing an area of 100cm^2 is made of 200 turns of copper wire. Initially a 2.10 T uniform magnetic field points perpendicularly upward through the plane of the coil. The direction of the field reverses so that the final magnetic field has a magnitude of 2.10 T pointing downward through the coil. The coil is connected to a 5.00 ohm resistor.

http://i.imgur.com/x1vLzT5.jpg

a) If the magnetic field changes in a time intervale of 1.5 msec, what is the magnitude of the induced emf in the coil?

b) What is the induced current in the coil?

c) What is the direction of the induced current in the coil? Explain.

Explanation / Answer

area is A = 100 x 10^-4 m

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