13 A metallic ring is attached with the wall of a room. When the north pole of a magnet is brought near to it, the induced current in the ring will be A)First clockwise then anticlockwise B)ln clockwise direction Clln cuontericlockwise direction D)First anticlockwise then clockwise O A O B OD

13 A metallic ring is attached with the wall of a room. When the north pole of a magnet is brought near to it, the induced current in the ring will be A)First clockwise then anticlockwise B)ln clockwise direction Clln cuontericlockwise direction D)First anticlockwise then clockwise O A O B OD

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter22: Magnetism

Section: Chapter Questions

Problem 68PE: Figure 22.62 shows a long straight wire just touching a loop carrying a current I1. Beth lie in the...

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A magnetized sewing needle has a magnetic moment of 9.70 mA m2. At its location, the Earths magnetic field is 55.0 T northward at 48.0 below the horizontal. Identify the orientations of the needle that represent (a) the minimum potential energy and (b) the maximum potential energy of the needlefield system. (c) How much work must be done on the system to move the needle from the minimum to the maximum potential energy orientation?
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Figure 22.62 shows a long straight wire just touching a loop carrying a current I1. Beth lie in the same plane. (a) What direction must the current I2 in the straight wire have to create a field at the center of the loop in the direction opposite to that created by the loop? (b) What is the ratio at I1/I2 that gives zero field strength at the center at the loop? (c) What is the direction of the field directly above the loop under this circumstance?
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