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Magnetism and Electromagnetism

Magnetism and Electromagnetism
There is 900 mA of current through a wire with 40 turns. What is the reluctance of the circuit if the flux is 400 Wb?

1,440 At/Wb
90,000 At/Wb
14,400 At/Wb
9,000 At/Wb

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Magnetism and Electromagnetism
The materials are a bit inferior conductors of magnetic flux than air.

None of the listed here
Ferromagnetic
Diamagnetic
Dielectric

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Magnetism and Electromagnetism
What is the magnitude and the direction of force per 1.1m length of a pair of conductors of a direct current linecarrying 10 amperes and spaced 100 mm apart ?

22 x 10"7 N
22 x 10"5 N
22 x 10-6 N
22 x 10"8 N

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Magnetism and Electromagnetism
Core of an electromagnet should have

None of the listed here
High susceptibility
Both low coercivity and high susceptibility
Low coercivity

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Magnetism and Electromagnetism
What is the flux density when the flux is 5.5 Wb and the cross-sectional area is 6 × 10–3 m2?

9.7 T
91.7 T
917 T
91 T

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Magnetism and Electromagnetism
Magnetic moment is a

scalar quantity
vector quantity
pole strength
universal constant

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MORE MCQ ON Magnetism and Electromagnetism

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