Magnetism and Capacitor Set 1

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Which is dia magnetic substance?

  

    (A) Iron and nickel

    (B) Aluminium

    (C) Graphite

    (D) Copper

Graphite

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What is the metal composition of Permalloy?

  

    (A) Iron and nickel

    (B) Iron and copper

    (C) Iron and aluminium

    (D) Iron and chromium

Iron and nickel

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What is the unit of permeability?

  

    (A) Weber/metre

    (B) No unit (mere number)

    (C) Ampere turns/web

    (D) Ampere turns/metre2

No unit (mere number)

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Which factor depends on the permeability of the material?

  

    (A) Length

    (B) Flux density

    (C) Field intensity

    (D) Magneto motive force

Flux density

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

  

    (A) Clock rule

    (B) Lenz law

    (C) Ampere rule

    (D) Corkscrew rule

Lenz law

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