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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
4
6
12

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Magnetism and Electromagnetism
Paramagnetic materials have relative permeability

equal to that ferromagnetic mate rials
slightly less than unity
equal to unity
slightly more than unity

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Magnetism and Electromagnetism
What is the magneto-motive force (mmf) of a wire with 8 turns carrying three amperes of current?

24 At
2.4 At
240 At
2,400 At

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Magnetism and Electromagnetism
The attraction capacity of electromagnet will increase if the

Flux density decreases
Flux density increases
Core area increases
Core length increases

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Magnetism and Electromagnetism
Gilbert is a unit of

conductance
electromotive force
permittivity
magnetomotive force

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Magnetism and Electromagnetism
A permeable substance is one

Which is a good conductor
Through which the magnetic lines of force can pass very easily
Which is a bad conductor
Which is a strong magnet

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MORE MCQ ON Magnetism and Electromagnetism

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