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Magnetism and Electromagnetism

Magnetism and Electromagnetism
Hysteresis loop in case of magnetically hard materials is more in shape as compared to magnetically soft materials.

None of the listed here
circular
triangular
rectangular

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Magnetism and Electromagnetism
When the current through the coil of an electromagnet reverses, the

direction of the magnetic field remains unchanged
direction of the magnetic field reverses
magnetic field collapses
magnetic field expands

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Magnetism and Electromagnetism
Which of the following is a ferromagnetic material?

Copper
Nickel
Aluminium
Tungsten

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Magnetism and Electromagnetism
Strength of an electromagnet can be increased by

Increasing current supply
Increasing the cross-sectional area
All of the listed here
Increasing the number of turns

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Magnetism and Electromagnetism
The use of permanent magnets is. not made in

Loud speakers
None of the listed here
Energy meters
Transformers

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Magnetism and Electromagnetism
The attraction capacity of electromagnet will increase if the

Core length increases
Flux density increases
Flux density decreases
Core area increases

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MORE MCQ ON Magnetism and Electromagnetism

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