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Magnetism and Electromagnetism

Magnetism and Electromagnetism
A conductor of length L has current I passing through it, when it is placed parallel to a magnetic field. The force experienced by the conductor will be

Zero
BLI2
BLI
None of the listed here

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Magnetism and Electromagnetism
An electromagnetic field exists only when there is

decreasing current
current
an increasing current
voltage

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Magnetism and Electromagnetism
The commonly used material for shielding or screening magnetism is

Aluminium
Soft iron
Brass
Copper

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Magnetism and Electromagnetism
Magnetic moment is a

pole strength
scalar quantity
vector quantity
universal constant

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Magnetism and Electromagnetism
What is the magneto-motive force in a 75-turn coil of wire when there are 4 A of current through it?

300 AT
3 AT
30 AT
0.3 AT

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Magnetism and Electromagnetism
A keeper is used to

Provide a closed path for flux
Change the direction of magnetic lines
Restore lost flux
Amplify flux

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MORE MCQ ON Magnetism and Electromagnetism

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