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Two generators use the same magnetic field and operate at the same frequency. Each has a single-turn circular?

Tuesday, August 2, 2011

Two generators use the same magnetic field and operate at the same frequency. Each has a single-turn circular coil. One generator has a coil radius of 3.8 cm and a peak emf of 1.8 V. The other generator has a peak emf of 3.9 V. Find the coil radius r of this other generator.

A rectangular loop with 100 turns and area of 0.12 m2 rotates at 100 rad/s. The axis of rotation of the square?

Monday, August 1, 2011

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A rectangular loop with 100 turns and area of 0.12 m2 rotates at 100 rad/s. The axis of rotation of the square is perpendicular to the direction of the magnetic field of 0.025 Tesla. What is the maximum emf induced in the loop? The emf produced in a generator is What is the frequency of [...]

What is the strength of the magnetic field?

Friday, July 29, 2011

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A generator consists of 10 turns of wire, and each turn has an area of 0.095^2 m. If a maximum emf of 120V is induced when the coil rotates with a frequency of 60Hz, what is the strength of the magnetic field? a- 0.85 T b- 0.34 T c- 0.15 T d- 1.5 T Its [...]

Quantifying the emf induced in a generator?

Wednesday, July 27, 2011

1 Comment

A generator is made from a set of 7000 loops of area 5.00 cm2 rotating at an angular frequency of 600 radians per second. The magnetic field is created by a solenoid, completely surrounding the generator coil, and carrying a current of 0.600 A. How many turns per unit length must the solenoid have in [...]

In electric generator, emf is created by a changing the flux in a loop. The flux is changed by?

Wednesday, July 13, 2011

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In electric generator, emf is created by a changing the flux in a loop. The flux is changed by? A. changing the total area of the loop B. changing the strength of the magnetic field involved C. changing the relative orientation of the field and the loop D. both (a) and (b) E. both (b) [...]

HELLLP! with physics – generators?

Saturday, June 25, 2011

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K. in my textbook, it shows a graph of the magnetic flux threading a coil over time. Underneath it has a graph of emf over the same time… it looks like this. http://openbookproject.net//electricCircuits/AC/02306.png You’ll notice that when magnetic flux is at a maximum, emf is at 0. Now I’m struggling to understand (this may not [...]

URGENT: Physics Question!?

Monday, May 23, 2011

2 Comments

A circular coil has 275 turns and a radius of 0.045 m. The coil is used as an AC generator by rotating it in a 0.500 T magnetic field. At what angular speed should the coil be rotated so that the maximum emf is 175 V? The answer is supposed to be w = 50 [...]

Electromag Physics Help?

Thursday, May 19, 2011

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A generator uses a coil that has 120 turns and a 0.65-T magnetic field. The frequency of this generator is 60.0 Hz, and its emf has an rms value of 120 V. Assuming that each turn of the coil is a square (an approximation), determine the length of the wire from which the coil is [...]

Flux, Faraday, Lenz, and Generators?

Sunday, May 8, 2011

2 Comments

The plane of a conductive loop with an area of 0.042 m2 is perpendicular to a uniform magnetic field of 0.38 T. If the field drops to zero in 0.0044 s, what is the magnitude of the average emf induced in the loop? V

a square loop side a is mounted on vertical shaft and rotated at angular velocity omega .a uniform magnetic fi?

Thursday, April 28, 2011

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a square loop side a is mounted on vertical shaft and rotated at angular velocity omega .a uniform magnetic field B points to the right .find the emf E(t) for tttthis alternating current generator ?