Current Electricity	MCQ

Current Electricity MCQ

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  • 27th Aug, 2022

Current Electricity MCQ Questions

Take Current Electricity MCQ Test & Online Quiz to test your Knowledge

Practice Best Current Electricity MCQ Questions that check your basic knowledge of Current Electricity. This Current Electricity MCQ Test contains 20+ Multiple Choice Questions. You have to select the right answer to the question. Apart from this, you can also download below the Current Electricity MCQ PDF completely free.

Current Electricity MCQ Test

1) What do you mean by electric current?

  • A. Electric current is the flow of electrons through a complete circuit of conductors.
  • B.Electric current is the flow of protons through a complete circuit of conductors.
  • C.Electric current is the flow of newtons through a complete circuit of conductors.
  • D.None of the above

2) What is the ratio of power dissipated if two electric bulbs are connected in series and the ratio of their resistance is 1:2?

  • A. 1:4
  • B.1:2
  • C.2:1
  • D.1: 1

3) What is the principle behind thermocouple?

  • A. Joule effect
  • B.Thomson effect
  • C.Seebeck effect
  • D.Peltier effect

4) Why a potentiometer is considered a versatile and accurate device to make an electrical measurement of EMF?

  • A. Because the method involves a combination
  • B.There are cells involved
  • C.because no flow of current through the galvanometer
  • D.Because of potential gradients

5) By increasing the temperature the resistance of a conductor __.

  • A. increases
  • B.decreases
  • C.remains constant
  • D.initially increases then decreases.
Download Free : Current Electricity MCQ PDF

6) A circuit consists of a resistance R connected to n similar cells. If the current in the circuit is the same whether the cells are connected in series or in parallel then the internal resistance r of each cell is given by ___.

  • A. r = R/n
  • B.r = R
  • C.r = 1/R
  • D.r = nR

7) Which of the following is wrong? Resistivity of a conductor is ___.

  • A. independent of temperature.
  • B.inversely proportional to temperature
  • C.independent of dimensions of conductor
  • D.less than resistivity of a semiconductor

8) Is Resistivity of a conductor is inversely proportional to temperature?

  • A. Yes
  • B.No

9) Resistivity of a conductor is independent of dimensions of conductor.

  • A. True
  • B.False

10) When there is an electric current through a conducting wire along its length, then an electric field must exist ___.

  • A. outside the wire but normal to it
  • B.inside the wire but normal to it
  • C.inside the wire but parallel to it
  • D.outside the wire but parallel to it

11) Combine three resistors 5 Q, 4.5 Q and 3 Q in such a way that the total resistance of this combination is maximum ___.

  • A. 12.5 Q
  • B.13.5 Q
  • C.14.5 Q
  • D.16.5 Q

12) In parallel combination of n cells, we obtain ___.

  • A. more voltage
  • B.more current
  • C.less voltage
  • D.less current

13) An electric heater is connected to the voltage supply. After few seconds, current gets its steady value then its initial current will be ___.

  • A. equal to its steady current
  • B.slightly higher than its steady current
  • C.slightly less than its steady current
  • D.zero

14) In Joule’s heating law, when I and t are constant, if the H is taken along the y axis and I2 along the x axis, the graph is ___.

  • A. straight line
  • B.parabola
  • C.circle
  • D.ellipse

15) A Daniel cell is balanced on 125 cm length of a potentiometer wire. Now the cell is short-circuited by a resistance 2 ohm and the balance is obtained at 100 cm. The internal resistance of the Daniel cell is ___.

  • A. 0.5 ohm
  • B.1.5 ohm
  • C.1.25 ohm
  • D.4/5 ohm

16) Electric pressure is also called ___.

  • A. Voltage
  • B.Current
  • C.Resistance
  • D.None of the above

17) What is the unit of electric current?

  • A. Arc
  • B.Ohm
  • C.Watt
  • D.amphere

18) Which instrument is used to measure electric current?

  • A. Voltmeter
  • B.Galvanometer
  • C.Wattmeter
  • D.None of the above

19) A piece of copper and another of germanium are cooled from room temperature to 80 K. The resistance of __.

  • A. copper decreases and germanium increases
  • B.each of them increases
  • C.each of them decreases
  • D.copper increases and germanium decreases

20) One ampere of current represents one coulomb of electric charge moving past a specific point in one second.

  • A. True
  • B.False

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