MAGNETISM AND CAPACITOR - Practice Mode

1) Which is dia magnetic substance?

Iron and nickel Aluminium Graphite Copper

Correct Answer: Graphite

2) What is the metal composition of Permalloy?

Iron and nickel Iron and copper Iron and aluminium Iron and chromium

Correct Answer: Iron and nickel

3) What is the unit of permeability?

Weber/metre No unit (mere number) Ampere turns/web Ampere turns/metre<sup>2</sup>

Correct Answer: No unit (mere number)

4) Which factor depends on the permeability of the material?

Length Flux density Field intensity Magneto motive force

Correct Answer: Flux density

5) Which rule is used to find the direction of the self induced emf in a coil?

Clock rule Lenz law Ampere rule Corkscrew rule

Correct Answer: Lenz law

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