| Tag Archive | magnetic field

Kindly make a critique or your comments (positive or negative) about electromagnetism. 10 POINTS FOR THE BEST!?

Wednesday, September 14, 2011

Kindly make a critique or your comments (positive or negative) about electromagnetism. 10 POINTS FOR THE BEST! Electromagnetism is the physics of the electromagnetic field, a field that exerts a force on particles with the property of electric charge and is reciprocally affected by the presence and motion of such particles. A changing magnetic field [...]

Electricity Generator Demonstration

Tuesday, September 13, 2011

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More films at www.vega.org.uk Jonathan demonstrates how to generate electricity using a Faraday (Magnetic) Coil.

What is the relation of electromagnetism in the lives of people? 10 POINTS FOR THE BEST ANSWERER!!!?

Monday, September 12, 2011

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What is the relation of electromagnetism in the lives of people? 10 POINTS FOR THE BEST ANSWERER!!!? What is the relation of electromagnetism in the lives of people? 10 POINTS FOR THE BEST ANSWERER!!! You can also add some comments about electromagnetism, your feedbacks, or opinions regard it. THANKS SO MUCH! I need a long [...]

3 Physical Science Questions?

Saturday, September 10, 2011

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In a solenoid, there will be no magnetic field if there is no ____________________ in the wires of the coil. The statement that a voltage can be induced in a conductor by a changing magnetic field is known as ____________________ law. Large power plants in the United States currently use _________________________ generators.

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

Sunday, September 4, 2011

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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 [...]

Urgent question about electric generators?

Friday, September 2, 2011

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So does an electric generator produce current when a magnet is making contact with the coil, or is it just the magnetic field? Do generator run out, or go bad (say because the magnet loses its magnetism, or the coil wears down)? Does it matter what the coil is made of (nickel, copper, aluminum, etc.)

Physics help pls? it's so complicated?

Tuesday, August 30, 2011

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12. A beam of unknown charged particles passes at right angles to the direction of magnetic field of 9.0 10^-2 T. If the speed of the particles is 3.0 10^4m/s and the force experienced is 8.64 10^-16N, how many electric charges are carried by one particle? 13. George has a bar magnet and a coil [...]

Do electrons continually cycle through the entire planet?

Sunday, August 28, 2011

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Electricity is electron flow, where electrons move from one atom to the next. Somehow all the electrons that get pushed out on the power grid have to come back to the generator is some way, so it seems to me. Things have to be balanced in nature. Since the earth has a magnetic field and [...]

Simple Physics Equation?

Saturday, August 27, 2011

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I need help with this Physics Equation? Use the following equations to find maximum emf. maximum emf=NABw w=2pief, where f = frequency in Hz 19. A generator consists of 10.0 turns of wire, and each turn has an area of 0.095m^2. If a maximum emf of 1.2 x 10^2 V is induced when the coil [...]