Multiple-Choice Homework Problem 19.4 The figure to the right shows the cross-se
ID: 1453931 • Letter: M
Question
Multiple-Choice Homework Problem 19.4 The figure to the right shows the cross-section of a wire in gray. The wire carries a current I uniformly distributed over the cross-section. Rank the currents encircled, Ii, by the three Amperian paths (dashed lines) drawn.
(a)I1 =I2 =I3
(b)I1 >I2 >I3
(c)I1 <I2 <I3
(d)I1 <I3 <I2
(e)I1 >I3 >I2
Multiple-Choice Homework Problem 19.8 The figure to the right shows a conductor in a uniform magnetic field. In what direction should the conductor be moved so that the magnitude of the voltage between points A and B (labelled on the figure) will be maximum?
(a) into or out of the page
(b) to the left or to the right of the page
(c) to the top or to the bottom of the page
(d) All directions of motion give the same emf.
(e) No matter how the bar is moved the emf is zero.
Multiple-Choice Homework Problem 19.9 The circular loop shown at the below is rotating in the direction indicated in a constant magnetic field with direction out of the page. At the time drawn, the normal of the loop makes an angle of 45? with the magnetic field. What is the direction of the current induced in the loop? At the time shown, the right side of the coil is moving into the page and the left side out of the page.
(a) No current is induced. (b) clockwise (c) counterclockwise
path 3 path 2 wire path 1Explanation / Answer
(d)I1 <I3 <I2
(b) to the left or to the right of the page
(b) clockwise
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