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Magnetism and Electromagnetism

Magnetism and Electromagnetism
Which of the following materials are diamagnetic?

Silver
Silver and copper
Iron
Copper

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Magnetism and Electromagnetism
Fleming's left hand rule is used to find

Direction of magnetic field due to current carrying conductor
Polarity of a magnetic pole
Direction of flux in a solenoid
Direction of force on a current carrying conductor in a magnetic field

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

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

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Magnetism and Electromagnetism
When a solenoid is activated, the force that moves the plunger is

an electromagnetic field
varying voltage
a steady current
a permanent magnetic field

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Magnetism and Electromagnetism
Indicate which of the following material does not retain magnetism permanently.

Hardened steel
Soft iron
Stainless steel
None of the listed here

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Magnetism and Electromagnetism
For a given wirewound core, an increase in current through the coil

reverses the flux lines
causes no change in flux density
increases the flux density
decreases the flux density

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