Quiz  /  Power Electronics Class 12 MCQ Questions With Answers

  • 1. 
    What is the purpose of a resistor?

  • control current flow
  • allow current flow
  • prevent current flow
  • allow heat to build up

  • 2. 
    Which of these is NOT a requirement for a simple circuit?

  • Voltage
  • Load
  • Conductor
  • Light

  • 3. 
    What is the tolerance for a Green, Red, Black, Gold resistor?

  • 1%
  • 20%
  • 5%
  • 10%

  • 4. 
    What is the tolerance for a Red, Brown, Brown, Silver resistor?

  • 1%
  • 20%
  • 5%
  • 10%

  • 5. 
    How is the value of resistance marked on a precision resistor?

  • printed
  • color bands
  • number/letter code
  • military specification code

  • 6. 
    What is the shape of a carbon film resistor?

  • cylindrical
  • round
  • square
  • bone

  • 7. 
    How is the value of resistance marked on a power resistor?

  • printed
  • color bands
  • number/letter code
  • military specification code

  • 8. 
    What is the resistance for a Red, Brown, Black resistor?

  • 21 Ohms
  • 210 Ohms
  • 12 Ohms
  • 120 Ohms

  • 9. 
    What is the color code for a Orange, Black, Red resistor?

  • 3k Ohms
  • 200 Ohms
  • 300 Ohms
  • 2K Ohms

  • 10. 
    Resistance is measured in\:

  • volts
  • amps
  • ohms
  • watts

  • 11. 
    Resistors can be found in __________ types of electronic equipment

  • all
  • a few
  • no
  • most

  • 12. 
    What are rheostats used for?

  • Control large amounts of heat
  • Vary large amounts of current
  • Control of a circuit's power rating
  • Vary a circuit's tolerance

  • 13. 
    What are fixed power resistors made from most often?

  • silver filament
  • carbon film
  • metal film
  • wire wound

  • 14. 
    A conductor____________________________

  • will not conduct current
  • resists current flow
  • provides a path for current flow
  • provides no path for current flow

  • 15. 
    What are power resistors used for?

  • As general purpose resistors
  • To obtain an exact value of resistance
  • Vary a circuit's power rating
  • Control large amounts of current

  • 16. 
    Current is measured in\:

  • volts
  • amps
  • ohms
  • watts

  • 17. 
    Which resistor will prevent the most current flow?

  • 1 ohm
  • 100 ohms
  • 1000 ohms
  • 0.5k ohms

  • 18. 
    How does resistance affect current?

  • less resistance - less current
  • more resistance - less current
  • more resistance - more current
  • resistance does not affect current

  • 19. 
    What are the color codes for a 210 ohm resistor?

  • brown, grey, red
  • brown, black, yellow
  • red, brown, brown
  • brown, black, brown

  • 20. 
    What are the color codes for a 470k ohm resistor?

  • Yellow, Violet, Yellow
  • Orange, Grey, Orange
  • Yellow, Violet, Orange
  • Orange, Grey, Yellow

  • 21. 
    Which of these is a very good insulator?

  • water
  • silver
  • wood
  • rubber

  • 22. 
    What is the color for the numerical value of 2 on a resistor?

  • brown
  • black
  • orange
  • red
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