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Magnetism and Electromagnetism

Magnetism and Electromagnetism
Tesla is a unit of

Field strength
Flux density
Inductance
Flux

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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?

8
4
6
12

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

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

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

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

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Magnetism and Electromagnetism
When the speed at which a conductor is moved through a magnetic field is increased, the induced voltage

increases
reaches zero
decreases
remains constant

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Magnetism and Electromagnetism
The induced voltage across a coil with 250 turns that is located in a magnetic field that is changing at a rate of 8 Wb/s is

2,000 V
3,125 V
1,000 V
31.25 V

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MORE MCQ ON Magnetism and Electromagnetism

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