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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The susceptibility of paramagnetic materials generally lies between

KT3 and 1CT6
10"2 and KT5
KT4 and KT8
1CT3 and 1CT7

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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?

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

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Magnetism and Electromagnetism
Which of the following is a vector quantity?

Relalative permeability
Magnetic field intensity
Flux density
Magnetic potential

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

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

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

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

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Magnetism and Electromagnetism
When the current through the coil of an electromagnet reverses, the

direction of the magnetic field remains unchanged
magnetic field expands
magnetic field collapses
direction of the magnetic field reverses

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