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Magnetism and Electromagnetism

Magnetism and Electromagnetism
What will be the current passing through the ring shaped air cored coil when number of turns is 800 and ampere turns are 3200?

8
6
4
12

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Magnetism and Electromagnetism
The unit for reluctance is

At/Wb
tesla
At/m
Wb

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Magnetism and Electromagnetism
A 300 mm long conductor is carrying a current of 10 A and is situated at right angles to a magnetic field having a flux density of 0.8 T ; the force on the conductor will be

240 N
24 N
2.4 N
0.24 N

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Magnetism and Electromagnetism
Magnetism of a magnet can be destroyed by

Hammering
By inductive action of another magnet
Heating
All of the listed here

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Magnetism and Electromagnetism
The susceptibility of paramagnetic materials generally lies between

1CT3 and 1CT7
KT3 and 1CT6
10"2 and KT5
KT4 and KT8

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Magnetism and Electromagnetism
What will be the magnetic potential difference across the air gap of 2 cm length in magnetic field of 200 AT/m?

16 AT
10 AT
4 AT
8 AT

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MORE MCQ ON Magnetism and Electromagnetism

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