CLASS XII – SAMPLE PAPER PHYSICS Time allowed : 3 hours Max. Marks : 70 General Instructions: All questions are compulsory There are 30 questions in total. Questions 1 to 8 carry one mark each, 9 to 18 carry two marks each, 19 to 27 carry 3 marks each and 28 to 30 carry 5 […]
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What is Eddy Current?
Eddy currents are circulating currents induced in the body of a solid conductor whenever the magnetic flux linked with it changes. It is called EDDY CURRENT because they are like eddies formed in water. Also read http://askphysics.com/ask-physics/eddy-currents-applications/
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I have read that the FLOW OF ELECTRONS is called electricity. I wanna know that what is meant by flow of electrons? Pleaz answer me…. (Asked Kiruthika) Answer: Electric current is the flow of charges. (Measured as the rate of flow of charges). In conductors electric current is caused by the flow of free electrons. When a potential difference is […]
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How can an alternating current change its direction while moving in a wire or any conductor? Why direct currents aren’t used in Home circuits?
RAHUL ASKED
Answer:
Alternating current is produced by rotating a coil in a strong magnetic field (or …
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What ere Eddy currents and what is their application?
Rahul asked
Answer:
Eddy currents (also called Foucault currents) are currents induced in conductors, when the magnetic flux linked with a solid conductor changes. The change in magnetic flux can …
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“How do we know the direction of magnetic field around the current carrying conductor?” Asked Nikhil
Incoming search terms:direction of magnetic field around a current carrying conductorDIRECTION OF MAGNETIC FIELD IN CURRENT CARRYING CONDUCTORmagne…
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Coulombian force and conductor
what’s effect of coulombic forces on conductor medium ? amk niazi Ans: In a conductor, the coulombian repulsive forces pushes the valence electrons and the electrons move away from the center to the surface ie from the region of stronger force to the region of lesser force, creating a Faraday cage Incoming search terms:what’s effect of coulombic forces on conductor […]