Current Electricity MCQs with answers Page - 2

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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A

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Q. Bulbs in street lighting are all connected in

  • (A) parallel
  • (B) series
  • (C) series-parallel
  • (D) end-to-end

A

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Q. __________ are the materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators.

  • (A) Varistors
  • (B) Thermistor
  • (C) Semi-conductors
  • (D) Variable resistors

A

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Q. An open resistor, when checked with an ohm-meter reads

  • (A) zero
  • (B) infinite
  • (C) high but within tolerance
  • (D) low but not zero

A

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Q. An instrument which detects electric current is known as

  • (A) voltmeter
  • (B) rheostat
  • (C) wattmeter
  • (D) galvanometer

A

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Q. An electric filament bulb can be worked from

  • (A) D.C. supply only
  • (B) A.C. supply only
  • (C) Battery supply only
  • (D) All above

A

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Q. All of the following are equivalent to watt except

  • (A) (amperes) ohm
  • (B) joules/sec.
  • (C) amperes x volts
  • (D) amperes/volt

A

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Q. All good conductors have high

  • (A) conductance
  • (B) resistance
  • (C) reluctance
  • (D) thermal conductivity

A

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Q. A thermistor has

  • (A) positive temperature coefficient
  • (B) negative temperature coefficient
  • (C) zero temperature coefficient
  • (D) variable temperature coefficient

A

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Q. A substance whose molecules consist of dissimilar atoms is called

  • (A) semi-conductor
  • (B) super-conductor
  • (C) compound
  • (D) insulator

A

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Q. A rheostat differs from potentiometer in the respect that it

  • (A) has lower wattage rating
  • (B) has higher wattage rating
  • (C) has large number of turns
  • (D) offers large number of tapping

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