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Magnetism and Electromagnetism

Magnetism and Electromagnetism
What will be the magnetic potential difference across the air gap of 2 cm length in magnetic field of 200 AT/m?

8 AT
10 AT
4 AT
16 AT

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Magnetism and Electromagnetism
Reciprocal of permeability is

Reluctivity
conductance
Permeability
Susceptibility

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Magnetism and Electromagnetism
A permeable substance is one

through which the magnetic lines of force can pass very easily
which is a good conductor
which is a bad conductor
which is a strong magnet

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Magnetism and Electromagnetism
The induced voltage across a coil with 250 turns that is located in a magnetic field that is changing at a rate of 8 Wb/s is

31.25 V
3,125 V
2,000 V
1,000 V

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Magnetism and Electromagnetism
Substances which have permeability less than the permeability of free space are known as

Diamagnetic material
Bipolar
Ferro magnetic material
Paramagnetic material

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Magnetism and Electromagnetism
For a given wirewound core, an increase in current through the coil

increases the flux density
reverses the flux lines
decreases the flux density
causes no change in flux density

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MORE MCQ ON Magnetism and Electromagnetism

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