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PHYSICS MCQs

Total Questions : 3767 | Page 53 of 377 pages
Question 521. The metal used to make lightning conductors is
  1.    Iron
  2.    Aluminium
  3.    Copper
  4.    Zinc
 Discuss Question
Answer: Option C. -> Copper
Question 522. One Kilowatt hour is equal to -
  1.    3.6 Mega Joule
  2.    3.8 Mega Joule
  3.    3.2 Mega Joule
  4.    4.0 Mega Joule
 Discuss Question
Answer: Option A. -> 3.6 Mega Joule
Question 523. Good conductor of electricity is
  1.    Dry air
  2.    Paper
  3.    Kerosene
  4.    Graphite
 Discuss Question
Answer: Option D. -> Graphite
Question 524. Materials that usually are good conductors of electricity?
  1.    Aluminium
  2.    Lead
  3.    Nickel
  4.    Wood
 Discuss Question
Answer: Option A. -> Aluminium
Question 525. Pure water is bad conductor of electricity because it is
  1.    Feebly ionized
  2.    Not volatile
  3.    A very good solvent
  4.    A non-polar solvent
 Discuss Question
Answer: Option A. -> Feebly ionized
Question 526. The metal whose electrical conductivity is more, is
  1.    Copper
  2.    Aluminium
  3.    Silver
  4.    Lead
 Discuss Question
Answer: Option C. -> Silver
Question 527. A bird sitting on a high tension electric wire does not get electrocuted because
  1.    It has high resistance
  2.    The body is earthed
  3.    It does not form a closed path for the flow of current
  4.    Its feet are good insulators
 Discuss Question
Answer: Option C. -> It does not form a closed path for the flow of current
Question 528. Which of the following is a conductor of electricity ?
  1.    Rubber
  2.    Pure water
  3.    Salt water
  4.    Benzene
 Discuss Question
Answer: Option C. -> Salt water
Question 529. The fuse in our domestic electric circuit melts when there is a high rise in
  1.    Inductance
  2.    Current
  3.    Resistance
  4.    Capacitance
 Discuss Question
Answer: Option B. -> Current
Question 530. Fuse wire is made of an alloy of
  1.    Tin and Lead
  2.    Tin and Copper
  3.    Lead and Copper
  4.    Copper and Silver
 Discuss Question
Answer: Option A. -> Tin and Lead

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