Current Electricity MCQs with answers Page - 1

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. A 3 Q resistor having 2 A current will dissipate the power of

  • (A) 2 watts
  • (B) 4 watts
  • (C) 6 watts
  • (D) 8 watts

A

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Q. A 40 W bulb is connected in series with a room heater. If now 40 W bulb is replaced by 100 W bulb, the heater output will

  • (A) decrease
  • (B) increase
  • (C) remain same
  • (D) heater will burn out

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Q. A closed switch has a resistance of

  • (A) zero
  • (B) about 50 ohms
  • (C) about 500 ohms
  • (D) infinity

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Q. A current of 16 amperes divides between two branches in parallel of resistances 8 ohms and 12 ohms respectively. The current in each branch is

  • (A) 6.4 A, 6.9 A
  • (B) 6.4 A, 9.6 A
  • (C) 4.6 A, 6.9 A
  • (D) 4.6 A, 9.6 A

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Q. A field of force can exist only between

  • (A) two molecules
  • (B) two ions
  • (C) two atoms
  • (D) two metal particles

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Q. A glass rod when rubbed with silk cloth is charged because

  • (A) it takes in proton
  • (B) its atoms are removed
  • (C) it gives away electrons
  • (D) it gives away positive charge

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Q. A light bulb draws 300 mA when the voltage across it is 240 V. The resistance of the light bulb is

  • (A) 400 Q
  • (B) 600 Q
  • (C) 800 Q
  • (D) 1000 Q

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Q. A nichrome wire used as a heater coil has the resistance of 2 £2/m. For a heater of 1 kW at 200 V, the length of wire required will be

  • (A) 80 m
  • (B) 60 m
  • (C) 40 m
  • (D) 20 m

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Q. A resistance having rating 10 ohms, 10 W is likely to be a

  • (A) metallic resistor
  • (B) carbon resistor
  • (C) wire wound resistor
  • (D) variable resistor

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