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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The voltage induced across a certain coil is 200 mV. A 120 resistor is connected to the coil terminals. The induced current is

16 mA
12 mA
120 mA
1.7 mA

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Magnetism and Electromagnetism
The Biotsavart's law is a general modification of

Kirchhoff's law
Ampere's law
Faraday's laws
Lenz's law

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

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

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Magnetism and Electromagnetism
Magnetising steel is normals difficult because

it corrodes easily
it has low permeability
it has high specific gravity
it has high permeability

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Magnetism and Electromagnetism
Substances which have permeability less than the permeability of free space are known as

Diamagnetic material
Bipolar
Ferro magnetic material
Paramagnetic material

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Magnetism and Electromagnetism
A conductor of length L has current I passing through it, when it is placed parallel to a magnetic field. The force experienced by the conductor will be

BLI
Zero
BLI2
None of the listed here

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