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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The unit for permeability is

At/m
Wb
Wb/At × m
At/Wb

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Magnetism and Electromagnetism
When two ends of a circular uniform wire are joined to the terminals of a battery, the field at the center of the circle

will depend on the amount of e.m.f. applied
will be infinite
will be zero
will depend on the radius of the circle

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Magnetism and Electromagnetism
Which of the following is a vector quantity?

Magnetic potential
Relalative permeability
Magnetic field intensity
Flux density

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Magnetism and Electromagnetism
Strength of an electromagnet can be increased by

Increasing the cross-sectional area
All of the listed here
Increasing the number of turns
Increasing current supply

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Magnetism and Electromagnetism
The change of cross-sectional area of conductor in magnetic field will affect

both of the listed here
resistance of conductor
None of these
reluctance of conductor

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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?

4
6
12
8

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