voltage and current mcqs

voltage and current mcqs

  1. The conductance of 8 ohm resistance is
  • 12.5 ms
  • 8 ms
  • 125 ms
  • none

2. A neutral atom with an atomic number of 5 has how many electrons ?

  • 1
  • 5
  • None
  • Depends on the type of atom

3. An ammeter is an electrical instrument used to measure

  • current
  • voltage
  • resistance
  • none

4.A wiper is the sliding contact in a

  • switch
  • photoconductive cell
  • thermistor
  • potentiometer

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 5.Electrons in the outer orbit are called

  • nuclei
  • valence
  • waves
  • shells

6.Resistance limit the current.

  • true
  • false

7.Which of the following is not the type of energy source?

  • generator
  • rheostat
  • solar cell
  • battery

8. The maximum resistance value for a brown, red, yellow, gold resistor is

  • 126000 ohms
  • 12600 ohms
  • 114000 ohms
  • 132000 ohms

9.The unit of electrical charge is

  • volt
  • ampere
  • coulomb
  • none

10.Free electrons make current possible.

  • true
  • false

11.Current flows in a circuit when

  • switch is opened
  • switch is closed
  • switch is either open or close
  • none

12. A voltmeter is connected across the current path.

  • true
  • false

13. A multimeter measures

  • Current
  • Voltage
  • Resistance
  • Current, voltage, and resistance

14. A circuit breaker is a

  • fuse
  • switch
  • resistor
  • resettable protective device

15. Material with lots of free electrons are called

  • conductor
  • insulators
  • semiconductors
  • filters

16.A potentiometer is a two terminal variable resistors

  • true
  • false

17.The current in a given circuit is not to exceed 24 A. Which value of fuse is best?

  • A fuse is not necessary
  • 10 A
  • 24 A
  • 20 A

18. An open circuit is one that has a complete current path.

  • True
  • False

19.A neutral atom is one with an equal number of protons and electrons.

  • True
  • False

20. An ohmmeter is an instrument for measuring

  • Current
  • Voltage
  • Resistance
  • Wattage

21.When the current is 2.5 A, how many coulombs pass a point in 0.2 s?

  • 12.5 C
  • 1.25 C
  • 0.5 C
  • 5 C

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voltage and current mcqs
Electronics MCQ