# 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

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

mcqs on diodes special purpose diodes