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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

12 mA
1.7 mA
120 mA
16 mA

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Magnetism and Electromagnetism
The unit for reluctance is

Wb
At/Wb
tesla
At/m

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Magnetism and Electromagnetism
A magnetic field exists around

Moving Charges
Iron
Aluminium
Copper

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Magnetism and Electromagnetism
An electromagnetic field exists only when there is

decreasing current
current
an increasing current
voltage

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

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

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Magnetism and Electromagnetism
A 300 mm long conductor is carrying a current of 10 A and is situated at right angles to a magnetic field having a flux density of 0.8 T ; the force on the conductor will be

240 N
2.4 N
0.24 N
24 N

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