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Magnetism and Electromagnetism

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?

300 AT
3 AT
0.3 AT
30 AT

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Magnetism and Electromagnetism
The use of permanent magnets is. not made in

None of the listed here
Transformers
Loud speakers
Energy meters

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Magnetism and Electromagnetism
In the left hand rule, forefinger always represents

current
Voltage
direction of force on the conductor
magnetic field

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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

1.7 mA
120 mA
12 mA
16 mA

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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?

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

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Magnetism and Electromagnetism
Susceptibility is positive for

diamagnetic substances
None of these
ferromagnetic substances
non-magnetic substances

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MORE MCQ ON Magnetism and Electromagnetism

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