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Magnetism and Electromagnetism

Magnetism and Electromagnetism
When the north poles of two bar magnets are brought close together, there will be

a downward force
a force of attraction
no force
a force of repulsion

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Magnetism and Electromagnetism
The electromagnet has 50 turns and a current of 1A flows through the coil. If the length of the magnet circuit is 200 mm, what is the magnetic field strength?

250 AT/m
25 AT/m
0.25 AT/m
2500 AT/m

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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?

200 At
150 At
300 At
100 At

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Magnetism and Electromagnetism
The unit for reluctance is

Wb
At/Wb
At/m
tesla

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

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

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Magnetism and Electromagnetism
The unit for permeability is

Wb
Wb/At × m
At/Wb
At/m

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MORE MCQ ON Magnetism and Electromagnetism

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