A square coil parallel to page enters a region where a uniform magnetic field is

Question

A square coil parallel to page enters a region where a uniform magnetic field is directed perpendicularly into page, travels through the region at a constant speed, and exits. An edge of the square is alpha = 20 xm and its speed is v = 25 m/s. The magnitude of the magnetic field is B = 0.5 T. Find the magnitude of the cmf when it is entering the region. Find the magnitude of the cmf when it is at the center of the region. Find the magnitude of the cmf when it is exiting the region. How does the magnitude of the cmf change in time?

Explanation / Answer

magnitude of induced emf is

e = B lv

(a)when entering region B = 0

e = 0

(b)inside

e = 0.5 ( 25) (0.2 m) = 2.5 V

(c)when leaving region B = 0

e = 0

(d)

figure (A) shows the emf change in time

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