The figure shows a 500 turn circular coil entering a region (inside the dashed r

Question

The figure shows a 500 turn circular coil entering a region (inside the dashed rectangle) when the magnetic field B is constant and equal to 1.25 Tesla. Assume B is out of the page. The 5.00 ohm coil is connected to a 8.00 ohm resistor. (a) If the initial position of the coil is completely outside of the magnetic field, calculate change in flux when the coil reached final position entirely inside the region of the magnetic field. Travel time is 1.65 seconds (b) the diameter of the coil is 19.50 mm, calculate induced emf when the coil entirely entered the magnetic field region. (c) Calculate the maximum current in the coil. (d) For the intermediate position, shown on the figure below, does the magnetic flux increase or decrease as the coil enters the magnetic region? Please write a couple of statements to support your answer. (e) What is the direction of the induced current in the coil, clockwise or counter clockwise? Please write a couple of statements to explain your answer. (f) What is the direction of the force on the coil. Please write a couple of statements to support your answer. (g) What is the flux change while the coil is entirely inside the region of the magnetic field? Please write a couple of statements to support your answer.

Explanation / Answer

a)

change in flux =N BA

change in flux = 0.059 Tm^2

b)

induced emf

E = change in flux / time

E = 0.036 V

d)

increases

as the area of the coil inside field increases

e)

clockwise

emf will be induced in the directio oppsodit to the change in flux

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