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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The relative permeability is less than unity is case of

Ferrits
Paramagnetic material
Ferromagnetic material
Diamagnetic material

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Magnetism and Electromagnetism
The direction of magnetic lines of force is

From south pole to north pole
None of the listed here
From north pole to south pole
From one end of the magnet to another

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Magnetism and Electromagnetism
What is the magnetomotive force in a 75-turn coil of wire when there are 4 A of current through it?

18.75 At
300 At
30 At
187 At

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Magnetism and Electromagnetism
The induced voltage across a stationary conductor in a stationary magnetic field is

reversed in polarity
increased
decreased
zero

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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
16 mA
120 mA

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Magnetism and Electromagnetism
An electromagnetic field exists only when there is

an increasing current
voltage
decreasing current
current

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MORE MCQ ON Magnetism and Electromagnetism

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