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Magnetism and Electromagnetism

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

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Magnetism and Electromagnetism
Unit for quantity of electricity is

Coulomb
Joule
Ampere
Ampere-hour

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Magnetism and Electromagnetism
Which of the following is not a unit of flux?

Weber
Tesla
Maxwell
All of the listed here

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Magnetism and Electromagnetism
A keeper is used to

Amplify flux
Change the direction of magnetic lines
Restore lost flux
Provide a closed path for flux

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Magnetism and Electromagnetism
Susceptibility is positive for

non-magnetic substances
ferromagnetic substances
diamagnetic substances
None of these

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Magnetism and Electromagnetism
One telsa is equal to

1 mWb/m²
1 Wb/m
1 Wb/mm²
1 Wb/m²

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