Tag Archive: conductor

Nov 15

CLASS XII PHYSICS SAMPLE PAPER FOR AISSCE 2012

CLASS XII – SAMPLE PAPER

PHYSICS

Time allowed : 3 hours

Max. Marks : 70

General Instructions:

  1. All questions are compulsory
  2. 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 marks each.
  3. There is no overall choice, but internal choices are provided. You have to attempt only one choice in full.
  4. Use of calculator is not permitted.
  5. You may use the logarithm table, if required.

1. Express dielectric constant in terms of capacitance.

2. What is magnetic susceptibility?

3. Define electromagnetic induction.

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Oct 23

What is Eddy Current?

Permanent link to this article: http://www.plustwophysics.com/what-is-eddy-current/

Oct 21

Electric Current and flow of electrons

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

read more

Permanent link to this article: http://www.plustwophysics.com/electric-current-and-flow-of-electrons/

Sep 15

Why direct currents aren’t used in Home circuits?

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 ...

Permanent link to this article: http://www.plustwophysics.com/why-direct-currents-aren%e2%80%99t-used-in-home-circuits/

Sep 14

Eddy currents and applications

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 ...

Permanent link to this article: http://www.plustwophysics.com/eddy-currents-and-applications/

Sep 10

Direction of magnetic field due to a current carrying conductor

“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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Aug 31

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 [...]

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