| Tag Archive | ac generator

someone pls help with these last physics questions asap!? 10pts?

Sunday, September 4, 2011

PLEASE HELP WITH THESE QUIZ QUESTIONS Question 36 Which of the following is used in an electric power station to minimize the power loss in an electric power transmission? ac generator step-up transformer step-down transformer dc motor Question 37 Which of the following electro-magnetic radiations has the shortest wavelength? microwaves x rays gamma rays radio [...]

someone pls help asap!? physics 10pts?

Saturday, September 3, 2011

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I NEED HELP WITH THESE QUIZ QUESTIONS ASAP PLEASE Question 22 A step-down transformer used on an 800 V line has 100 turns on the primary. What is the emf produced on the secondary coil if the turns on it are 40 turns? 200 V 320 V 2000 V 4000 V Question 23 The maximum [...]

What is the maximum emf output?

Monday, August 8, 2011

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A student makes a simple ac generator by using a single square wire loop 11 cm on a side. The loop is then rotated at a frequency of 60Hz in a magnetic field of 1.6×10−2 T. What is the maximum emf output?

Electromagnetic induction question?

Tuesday, June 21, 2011

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The coil of an AC generator has 160 turns, a length of 100mm and a width of 10mm. It spins in a unifrom magnetic field of 12mT at a constant frequency of 50Hz. Caclculate the peak voltage.

Physics, transformers and motors?

Friday, June 10, 2011

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1) A motor has an armature resistance of 4 Ohms. If it draws 8.5 A when running at full speed and connected to a 125 V line, how large is the back emf? 2) An AC generator has 85 rectangular loops on its armature. Each loop is 13 cm long and 7 cm wide. The [...]

URGENT: Physics Question!?

Monday, May 23, 2011

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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 [...]

Physics. Primary and secondary transformers. electromagnetic?

Monday, April 4, 2011

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1) The primary of a transformer has 350 turns and a voltage of 120 V across its terminals. What is the output voltage of the secondary if it has 180 turns? Answer:48V 2)An ac generator consists of a 135-turn circular planar coil that is able to rotate between the poles of a magnet. The magnetic [...]

Hi! Help me please I really appreciate it so much. Thank you?

Sunday, April 3, 2011

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In a model AC generator, a 498 turn rectangular coil 14.0 cm by 21 cm rotates at 124 rev/min in a uniform magnetic field of 0.65 T. (a) What is the maximum emf induced in the coil? ___ V (b) What is the instantaneous value of the emf in the coil at t = (π/30) [...]

If she wanted to make the maximum emf output ten times larger by adding loops, how many should she use in tota?

Friday, March 25, 2011

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A student makes a simple ac generator by using a single square wire loop 10 cm on a side. The loop is then rotated at a frequency of 60 Hz in a magnetic field of 1.1×10−2 T. If she wanted to make the maximum emf output ten times larger by adding loops, how many should [...]

Suppose you wanted to use the Earth's magnetic field to make an AC generator at a location where the…?

Saturday, March 19, 2011

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Suppose you wanted to use the Earth’s magnetic field to make an AC generator at a location where the magnitude of the field is 0.502 mT. Your coil has 1060 turns and a radius of 5.21 cm. At what angular velocity would you have to rotate it in order to generate an emf of amplitude [...]