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Magnetism and Electromagnetism

Magnetism and Electromagnetism
Ferrites are materials.

None of the listed here
Paramagnetic
Diamagnetic
Ferromagnetic

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Magnetism and Electromagnetism
What is the reluctance of a material that has a length of 0.07 m, a cross-sectional area of 0.014 m2, and a permeability of 4,500 Wb/At × m?

111 At/Wb
11 At/Wb
1 At/Wb
1111 At/Wb

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Magnetism and Electromagnetism
Substances which have permeability less than the permeability of free space are known as

Paramagnetic material
Bipolar
Diamagnetic material
Ferro magnetic material

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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
120 mA
12 mA
1.7 mA

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Magnetism and Electromagnetism
What is the mmf of a wire with 8 turns carrying three amperes of current?

24 AT
240 AT
2.4 AT
0.24 AT

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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?

10 AT
4 AT
16 AT
8 AT

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MORE MCQ ON Magnetism and Electromagnetism

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