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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The susceptibility of paramagnetic materials generally lies between

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

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Magnetism and Electromagnetism
The two conductors of a transmission line carry equal current I in opposite directions. The force on each conductor is

inversely proportional to I
proportional to distance between the conductors
proportional to 7
proportional to X

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Magnetism and Electromagnetism
Materials subjected to rapid reversal of magnetism should have

High co-ercivity and high retentivity
High co-ercivity and low density
Large area of B-H loop
High permeability and low hysteresis loss

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Magnetism and Electromagnetism
For which of the following materials the net magnetic moment should be zero?

antiferromagnetic materials
ferrimagnetic materials
diamagnetic materials
antiferrimagnetic materials

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

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Magnetism and Electromagnetism
The force between two long parallel conductors is inversely proportional to

Radius of conductor
Product of current in two conductors
Current in one conductor
Distance between the conductors

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