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Magnetism and Electromagnetism

Magnetism and Electromagnetism
What is the magneto-motive force (mmf) of a wire with 8 turns carrying three amperes of current?

2,400 At
2.4 At
240 At
24 At

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

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Magnetism and Electromagnetism
What is the reluctance of a material that has a length of 0.07 m, a cross-sectional area of 0.014 m2, and a permeability of 4,500 Wb/At × m?

111 At/Wb
11 At/Wb
1 At/Wb
1111 At/Wb

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Magnetism and Electromagnetism
The attraction capacity of electromagnet will increase if the

Core area increases
Core length increases
Flux density increases
Flux density decreases

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Magnetism and Electromagnetism
The force between two long parallel conductors is inversely proportional to

Current in one conductor
Radius of conductor
Product of current in two conductors
Distance between the conductors

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Magnetism and Electromagnetism
Magnetic moment is a

universal constant
pole strength
vector quantity
scalar quantity

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MORE MCQ ON Magnetism and Electromagnetism

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