Uniform Magnetic Field

Physics Problem. EMF?

Saturday, March 12, 2011

n ac generator has a circular coil of 88 turns and diameter 0.710 m which rotates about an axis in the plane of the coil and through its center. The coil rotates at 16.7 revolutions per second in a uniform magnetic field 0.050 T which is perpendicular to the axis of rotation. What is the [...]

Physics resistance questions?

Friday, March 11, 2011

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1. A motor has an armature resistance of 5 Ohms. If it draws 8 A when running at full speed and connected to a 125 V line, how large is the back emf? ______ Volts 2. An AC generator has 95 rectangular loops on its armature. Each loop is 13 cm long and 7 cm [...]

What is the maximum value of the emf produced when the loop is spun at 1200 rev/min about an axis perpendicula?

Wednesday, March 2, 2011

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An electric generator consists of 100 turns of wire formed into a rectangualar loop 40.0 cm by 30.0 cm, placed entirely in a uniform magnetic field with magnitude B = 3.50 T. What is the maximum value of the emf produced when the loop is spun at 1200 rev/min about an axis perpendicular to B?

electromotive force ? physics questions! hurry!?

Wednesday, February 23, 2011

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1.A flexible wire loop has a radius of r = 14.0 cm and it is inside a uniform magnetic field of B = 0.306 T. The loop is grasped at points P and Q and stretched until its area is zero. It takes 194 ms to close the loop. What is the magnitude of the [...]

final physic review 10 for 10 points straight?

Monday, February 7, 2011

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1 besides a plane mirror, wht type of mirror is used as a rear vew mirror in cars and y? 2 wht happeneds when light moves from a material with a lower index of refraction 2 another material with a higher index of a refraction 3 y is a convex lens also called a concerging [...]

physics help please.?

Friday, January 14, 2011

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A student modifies a simple generator by wrapping a much longer piece of wire around a cylinder with about one-fourth the area of the original loop (1.886 *10^-3 m2). Using a uniform magnetic field with a strength of 2.5* 10^-2 T, the student finds that by removing the coil perpendicular to the magnetic field lines [...]

Faraday's law of induction?

Friday, January 7, 2011

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An electric generator contains a coil of 110 turns of wire formed into a rectangular loop 60.0 cm by 40.0 cm, placed entirely in a uniform magnetic field with magnitude B = 3.50 T and with B initially perpendicular to the coil’s plane. What is the maximum value of the emf produced when the coil [...]

Magnet Field question helped needed, please! Will rate!!!?

Saturday, January 1, 2011

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I can’t figure this problem out. There is this metal wire that weighs 71kg which slides without friction on 2 horizontal rails which are a distance of 38m apart. The track is in a vertical uniform magnetic field of 16T. A constant current of 81A from a generator flows down from one rail, across this [...]

physics 2, ac circuitsss?

Thursday, December 23, 2010

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A 755-loop square armature coil with a side of 11.5 cm rotates at 55.0 rev/s in a uniform magnetic field of strength 0.45 T. What is the rms voltage output of the generator?

couple physics questions. Plzz help me?

Monday, December 20, 2010

2 Comments

1. A circular coil with a radius of R = .22 m and 17 turns is rotated in a uniform magnetic field of 1.7 T. The coil roated at a constant frequency of 2.0 Hz. Determine the maximum value of the emf induced in the coil. 2. A maximum emf of 90.4V is induced in [...]