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Magnetism and Electromagnetism

Magnetism and Electromagnetism
Which of the following is a vector quantity?

Magnetic potential
Magnetic field intensity
Relalative permeability
Flux density

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Magnetism and Electromagnetism
The voltage induced across a certain coil is 200 mV. A 120 resistor is connected to the coil terminals. The induced current is

16 mA
1.7 mA
120 mA
12 mA

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Magnetism and Electromagnetism
When the speed at which a conductor is moved through a magnetic field is increased, the induced voltage

reaches zero
remains constant
increases
decreases

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Magnetism and Electromagnetism
For a given wire-wound core, an increase in current through the coil

Increases the flux density
Causes no change in flux density
Decreases the flux density
Reverses the flux lines

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Magnetism and Electromagnetism
Magnetising steel is normals difficult because

it corrodes easily
it has high permeability
it has low permeability
it has high specific gravity

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Magnetism and Electromagnetism
Temporary magnets are used in

Loud speakers
Generators
All of the listed here
Motors

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MORE MCQ ON Magnetism and Electromagnetism

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