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MAGNETISM AND ELECTROMAGNETISM

Magnetism and Electromagnetism
The electromagnet has 50 turns and a current of 1A flows through the coil. If the length of the magnet circuit is 200 mm, what is the magnetic field strength?

250 AT/m
25 AT/m
2500 AT/m
0.25 AT/m

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

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Magnetism and Electromagnetism
What is the mmf of a wire with 8 turns carrying three amperes of current?

2.4 AT
0.24 AT
24 AT
240 AT

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Magnetism and Electromagnetism
Strength of an electromagnet can be increased by

All of the listed here
Increasing the cross-sectional area
Increasing current supply
Increasing the number of turns

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

300 AT
3 AT
30 AT
0.3 AT

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