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Magnetism and Electromagnetism

Magnetism and Electromagnetism
Tesla is a unit of

Flux
Inductance
Flux density
Field strength

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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

increases
remains constant
reaches zero
decreases

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

Nickel
Copper
Tungsten
Aluminium

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

rectangular
None of the listed here
triangular
circular

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Magnetism and Electromagnetism
There is 900 mA of current through a wire with 40 turns. What is the reluctance of the circuit if the flux is 400 Wb?

14,400 At/Wb
90,000 At/Wb
9,000 At/Wb
1,440 At/Wb

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Magnetism and Electromagnetism
Materials subjected to rapid reversal of magnetism should have

High co-ercivity and high retentivity
Large area of B-H loop
High co-ercivity and low density
High permeability and low hysteresis loss

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MORE MCQ ON Magnetism and Electromagnetism

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