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Unformatted text preview: Chapter 28: Magnetic Induction Section 281: Magnetic Flux A square loop of sides a lies in the yz plane with one corner at the origin. A varying magnetic field B = ky passes through the loop and points in the + x direction. The magnetic flux through the loop is A. ka 2 B. ka 2 /2 C. ka 3 /2 D. ka 3 /3 E. None of these is correct. x y z a a B A square loop of sides a lies in the yz plane with one corner at the origin. A varying magnetic field B = ky passes through the loop and points in the + x direction. The magnetic flux through the loop is A. ka 2 B. ka 2 /2 A. ka 3 /2 A. ka 3 /3 B. None of these is correct. x y z a a B You can change the magnetic flux through a given surface by A. changing the magnetic field. B. changing the surface area over which the magnetic field is distributed. C. changing the angle between the magnetic field and surface in question. D. any combination of a through c. E. none of these strategies. You can change the magnetic flux through a given surface by A. changing the magnetic field. B. changing the surface area over which the magnetic field is distributed. C. changing the angle between the magnetic field and surface in question. A. any combination of a through c. A. none of these strategies. Suppose you double the magnetic field in a given region and quadruple the area through which this magnetic field exists. The effect on the flux through this area would be to A. leave it unchanged. B. double it. C. quadruple it. D. increase it by a factor of six. E. increase it by a factor of eight. Suppose you double the magnetic field in a given region and quadruple the area through which this magnetic field exists. The effect on the flux through this area would be to A. leave it unchanged. B. double it. C. quadruple it. D. increase it by a factor of six. A. increase it by a factor of eight. The magnetic flux through a loop is made to vary according to the relation where the units are SI. The emf induced in the loop when t = 2 s is A. 38 V B. 39 V C. 40 V D. 31 V E. 19 V 1 7 6 2 m + + = t t The magnetic flux through a loop is made to vary according to the relation where the units are SI. The emf induced in the loop when t = 2 s is A. 38 V B. 39 V C. 40 V A. 31 V A. 19 V 1 7 6 2 m + + = t t The magnetic flux through a certain coil is given by where the units are SI. The coil has 100 turns. The magnitude of the induced emf when t = 1/200 s is A. 100 V B. 200 V C. zero D. 2/pi V E. 1/50pi V ) 100 cos( ) 50 / 1 ( m t = The magnetic flux through a certain coil is given by where the units are SI. The coil has 100 turns. The magnitude of the induced emf when t = 1/200 s is A. 100 V A. 200 V A. zero B. 2/pi V C. 1/50pi V ) 100 cos( ) 50 / 1 ( m t = For which of the diagram(s) will current flow through the light bulb? (In 3 and 4 assume the magnets move in the plane of the loop.) A. 1 B. 2 C. 3 D. 4 E. 1 and 2 N S N S N S N S 1 2 3 4 For which of the diagram(s) will current flow through the light bulb? through the light bulb?...
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 Fall '09
 Mueller
 Physics

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