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Magnetism and Electromagnetism

Magnetism and Electromagnetism
When a solenoid is activated, the force that moves the plunger is

a steady current
varying voltage
a permanent magnetic field
an electromagnetic field

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Magnetism and Electromagnetism
Indicate which of the following material does not retain magnetism permanently.

Stainless steel
Soft iron
Hardened steel
None of the listed here

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Magnetism and Electromagnetism
What is the flux density in a magnetic field in which the flux in 0.1 m2 is 600 Wb?

6,000 T
600 T
600 T
6 T

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Magnetism and Electromagnetism
What is the magnetomotive force in a 75-turn coil of wire when there are 4 A of current through it?

30 At
300 At
187 At
18.75 At

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

Polarity of a magnetic pole
Direction of flux in a solenoid
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
What is the flux density when the flux is 5.5 Wb and the cross-sectional area is 6 × 10–3 m2?

9.7 T
917 T
91 T
91.7 T

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MORE MCQ ON Magnetism and Electromagnetism

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