Physics MCQs with answers Page - 14

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A

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Q. The earth-wire of a cable is connected to

  • (A) The outer metallic body of the appliance
  • (B) The fuse of the appliance
  • (C) The filament of the appliance
  • (D) Short circuitry of the appliance

A

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Q. Lightning is caused due to

  • (A) Electric power
  • (B) Electric discharge
  • (C) Electric leak
  • (D) Electric pressure

A

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Q. Lightning is produced when

  • (A) Similar charges of electricity rush towards each other and then get repelled
  • (B) Clouds strike against impurities in air and the friction burns up these impurities
  • (C) Strong opposite charges in different clouds break down the resistance offered by the intervening air
  • (D) Water vapour produces electricity in the clouds

A

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Q. The metal used to make lightning conductors is

  • (A) Iron
  • (B) Aluminium
  • (C) Copper
  • (D) Zinc

A

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Q. Good conductor of electricity is

  • (A) Dry air
  • (B) Paper
  • (C) Kerosene
  • (D) Graphite

A

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Q. One Kilowatt hour is equal to -

  • (A) 3.6 Mega Joule
  • (B) 3.8 Mega Joule
  • (C) 3.2 Mega Joule
  • (D) 4.0 Mega Joule

A

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Q. Materials that usually are good conductors of electricity?

  • (A) Aluminium
  • (B) Lead
  • (C) Nickel
  • (D) Wood

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Q. Pure water is bad conductor of electricity because it is-

  • (A) Feebly ionized
  • (B) Not volatile
  • (C) A very good solvent
  • (D) A non-polar solvent

A

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Q. The metal whose electrical conductivity is more, is

  • (A) Copper
  • (B) Aluminium
  • (C) Silver
  • (D) Lead

A

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Q. Which of the following is a conductor of electricity ?

  • (A) Rubber
  • (B) Pure water
  • (C) Salt water
  • (D) Benzene

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