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Magnetism and Electromagnetism

Magnetism and Electromagnetism
A keeper is used to

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

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Magnetism and Electromagnetism
A coil of wire is placed in a changing magnetic field. If the number of turns in the coil is decreased, the voltage induced across the coil will

None of the listed here
Remain same
Increases
Decreases

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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

decreases
reaches zero
increases
remains constant

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Magnetism and Electromagnetism
An electromagnetic field exists only when there is

current
decreasing current
voltage
an increasing current

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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
16 AT
4 AT

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Magnetism and Electromagnetism
The uniform magnetic field is

The field of a single conductor
None of the listed here
The field in which all lines of magnetic flux are parallel and equidistant
The field of a set of parallel conductors

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MORE MCQ ON Magnetism and Electromagnetism

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