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Magnetism and Electromagnetism

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

2.4 At
2,400 At
240 At
24 At

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Magnetism and Electromagnetism
When two ends of a circular uniform wire are joined to the terminals of a battery, the field at the center of the circle

will be zero
will depend on the radius of the circle
will be infinite
will depend on the amount of e.m.f. applied

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

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

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Magnetism and Electromagnetism
The bar magnet has

Monopole moment
Dipole moment
Both dipole and monopole moment
None of the listed here

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

3 AT
0.3 AT
30 AT
300 AT

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

susceptance
permeance
residual magnetism
reluctance

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MORE MCQ ON Magnetism and Electromagnetism

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