Question

Multiple Choice (6 pts each) The closed circuit shown at right earries a current 154, where t=000 mand o = 0.20 m What is the magnitude and direction of the magnetic field at point! Magnitude D 2.36 x 10-5T c) 707:10-31 a) 236 T: 10-3 Direction Into the page Into the page Out of the page Out of the page 2 The figure shows, in cross section, three conductors that carry currents perpendicular to the plane of the figure. If the currents I s. I all have the same magnitude, for which puths) is are the line integral of the magnetic field equal to O as band c) paris a de DOS E b and d e depends on whether the integral goes clockwise or counterclockwise around the path. 3 The figure shows a bar magnet moving vertically upward towards hermal coil The poles of the bar magnets are Tanelid X and Y. As the bar magnet approaches the coil it aces an electric current in the direction indicated on the figure counter-clockwise as viewed from above). What are me correct polarities of the magnet? 2) X is a north pole. Y is a south pole. 5) X is a sout pola Y is a north pole. c) Bota X and Y are south poles 3) Bott X and Y are north poles. e) The polarities of the magnet cannot be determined from the information given.

Answer 1

- magnetic field at centes BEITET W, 3 (**) = R = 4x10*** 15* (ócot ode] S 13=7.07x10-5. 7) . 2 into the page a Direction 30 S Bidê - M. EI for loop-C, FI-0. .: .. BC0, and for imp-a, I-D B=0 OP tion- [u] y a and C path (3) X = south pole y = North Pole