Current Electricity MCQs with answers Page - 3

Here, you will find a collection of MCQ questions on Current Electricity. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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Q. Conductance : mho ::

  • (A) resistance : ohm
  • (B) capacitance : henry
  • (C) inductance : farad
  • (D) lumen : steradian

A

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Q. Conductance is reciprocal of

  • (A) resistance
  • (B) inductance
  • (C) reluctance
  • (D) capacitance

A

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Q. Copper wire of certain length and resistance is drawn out to three times its length without change in volume, the new resistance of wire becomes

  • (A) 1/9 times
  • (B) 3 times
  • (C) 9 times
  • (D) unchanged

A

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Q. Current velocity through a copper conductor is

  • (A) the same as propagation velocity of electric energy
  • (B) independent of current strength
  • (C) of the order of a few ˆ.s/m
  • (D) nearly 3 x 108 m/s

A

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Q. Electric current passing through the circuit produces

  • (A) magnetic effect
  • (B) luminous effect
  • (C) thermal effect
  • (D) chemical effect

A

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Q. Electric pressure is also called

  • (A) resistance
  • (B) power
  • (C) voltage
  • (D) energy

A

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Q. For testing appliances, the wattage of test lamp should be

  • (A) very low
  • (B) low
  • (C) high
  • (D) any value

A

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Q. Four wires of same material, the same cross-sectional area and the same length when connected in parallel give a resistance of 0.25 Q. If the same four wires are connected is series the effective resistance will be

  • (A) 1 Q
  • (B) 2 Q
  • (C) 3 Q
  • (D) 4 Q

A

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Q. Heat in a conductor is produced on the passage of electric current due to

  • (A) reactance
  • (B) capacitance
  • (C) impedance
  • (D) resistance

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