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Magnetism and Electromagnetism

Magnetism and Electromagnetism
Temporary magnets are used in

Loud speakers
Generators
Motors
All of the listed here

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Magnetism and Electromagnetism
Core of an electromagnet should have

Both low coercivity and high susceptibility
None of the listed here
Low coercivity
High susceptibility

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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

Decreases
None of the listed here
Increases
Remain same

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Magnetism and Electromagnetism
Ferrites are a sub-group of

Paramagnetic material
Non-magnetic materials
Ferro magnetic material
Ferri-magnetic material

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Magnetism and Electromagnetism
Fleming's left hand rule is used to find

Direction of flux in a solenoid
Polarity of a magnetic pole
Direction of force on a current carrying conductor in a magnetic field
Direction of magnetic field due to current carrying conductor

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Magnetism and Electromagnetism
A permeable substance is one

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

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MORE MCQ ON Magnetism and Electromagnetism

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