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Magnetism and Electromagnetism

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

18.75 At
187 At
300 At
30 At

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Magnetism and Electromagnetism
One telsa is equal to

1 Wb/m
1 Wb/mm²
1 Wb/m²
1 mWb/m²

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Magnetism and Electromagnetism
The magnetism left in the iron after exciting field has been removed is known as

residual magnetism
susceptance
permeance
reluctance

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Magnetism and Electromagnetism
The relative permeability is less than unity is case of

Paramagnetic material
Ferrits
Diamagnetic material
Ferromagnetic material

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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

reaches zero
remains constant
decreases
increases

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

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

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