Question

12. (5 pt.) If the circular conductor undergoes thermal expansion while it is in a uniform magnetic field, a current will be induced clockwise around it (lind). Which statement is correct? A. Bind is out of the page, so the magnetic field is directed out of the page B. Bindis out of the page, so the magnetic field is directed into the page C. Bina is into the page, so the magnetic field is directed into the page D. Bind is into the page, so the magnetic field is directed out of the page E. Since the conductor is in a uniform magnetic field, the magnetic field direction should not be changed from the unspecified original direction

Answer 1

ma 0 In a circular conductor, an induced liectro motive force which always gives rise to a current whose magnetic field Opposes the change in onginal magnetic flux. 3 In a circular conductor, an induced EMF this always gives rise to a cuorent whose magnetic field opposes the change in the original magnetic frux . Here the induced EMA and change in magnetic field have opposite signs. It is clear from lena law. ③ The induced EMF is into the page and it opposes to increase in fux outward though a coil. Therefore Magnetic field is directed out of the page