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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 296 · 40 questions
TalentJR

Remember (One part, one job): Resistor: limits current. Capacitor: stores a little charge. Diode: one way only. LED: one way and glows. Buzzer: sound. Motor: spinning. Potentiometer: a knob that changes resistance. LDR: light sensor. Thermistor: heat sensor. Fuse: protects by blowing. Transistor: boosts or switches.

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  1. 1.True or false: a fuse blows if current is high. (a) False (b) True
  2. 2.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) a motor (d) an LED
  3. 3.True or false: a resistor smooths a wobbly supply. (a) False (b) True
  4. 4.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a diode (d) a buzzer
  5. 5.True or false: a thermistor senses how hot it is. (a) False (b) True
  6. 6.🧩 Which component limits the current? (a) potentiometer (b) resistor (c) capacitor (d) buzzer
  7. 7.🧩 Which component glows using little power? (a) capacitor (b) diode (c) motor (d) LED
  8. 8.What does a resistor do? (a) beeps for an alarm (b) makes a beeping sound (c) has coloured bands (d) blows if current is high
  9. 9.🧩 Which component senses how hot it is? (a) diode (b) LED (c) capacitor (d) thermistor
  10. 10.🧩 Which component blows if current is high? (a) buzzer (b) fuse (c) potentiometer (d) capacitor
  11. 11.What does a potentiometer do? (a) smooths a wobbly supply (b) makes things spin (c) turns a fan or wheels (d) is a resistance knob
  12. 12.True or false: a resistor limits the current. (a) False (b) True
  13. 13.🧩 Which component stores a little charge? (a) transistor (b) LED (c) capacitor (d) fuse
  14. 14.What does a resistor do? (a) limits the current (b) senses how hot it is (c) glows using little power (d) blows if current is high
  15. 15.True or false: a fuse makes a beeping sound. (a) True (b) False
  16. 16.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  17. 17.True or false: an LDR senses how bright it is. (a) False (b) True
  18. 18.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
  19. 19.🧩 Which component lets current go one way? (a) LDR (b) motor (c) diode (d) potentiometer
  20. 20.True or false: a resistor senses how bright it is. (a) True (b) False
  21. 21.What does a transistor do? (a) glows using little power (b) smooths a wobbly supply (c) senses how bright it is (d) boosts a small signal
  22. 22.What does an LED do? (a) beeps for an alarm (b) glows using little power (c) turns a fan or wheels (d) makes things spin
  23. 23.True or false: a resistor has coloured bands. (a) False (b) True
  24. 24.True or false: a buzzer turns a fan or wheels. (a) True (b) False
  25. 25.True or false: a transistor stores a little charge. (a) True (b) False
  26. 26.What does a fuse do? (a) senses how bright it is (b) senses how hot it is (c) boosts a small signal (d) blows if current is high
  27. 27.True or false: a capacitor stores a little charge. (a) True (b) False
  28. 28.🧩 Which component has coloured bands? (a) LED (b) potentiometer (c) resistor (d) LDR
  29. 29.🧩 Which component makes a beeping sound? (a) fuse (b) resistor (c) buzzer (d) diode
  30. 30.What does a motor do? (a) makes a beeping sound (b) is a resistance knob (c) senses how bright it is (d) turns a fan or wheels
  31. 31.True or false: a motor is a resistance knob. (a) True (b) False
  32. 32.What does a diode do? (a) lets current go one way (b) senses how bright it is (c) has coloured bands (d) glows using little power
  33. 33.True or false: an LDR turns a fan or wheels. (a) False (b) True
  34. 34.What does a buzzer do? (a) turns a fan or wheels (b) beeps for an alarm (c) smooths a wobbly supply (d) senses how hot it is
  35. 35.What does a thermistor do? (a) is a resistance knob (b) senses how hot it is (c) glows using little power (d) boosts a small signal
  36. 36.True or false: a resistor makes things spin. (a) False (b) True
  37. 37.🧩 Which component beeps for an alarm? (a) fuse (b) resistor (c) capacitor (d) buzzer
  38. 38.🧩 Which component smooths a wobbly supply? (a) capacitor (b) potentiometer (c) buzzer (d) resistor
  39. 39.True or false: a diode turns a fan or wheels. (a) False (b) True
  40. 40.True or false: an LDR blows if current is high. (a) True (b) False

Answer key

  1. True
  2. a motor
  3. False
  4. a buzzer
  5. True
  6. resistor
  7. LED
  8. has coloured bands
  9. thermistor
  10. fuse
  11. is a resistance knob
  12. True
  13. capacitor
  14. limits the current
  15. False
  16. True
  17. True
  18. store charge briefly
  19. diode
  20. False
  21. boosts a small signal
  22. glows using little power
  23. True
  24. False
  25. False
  26. blows if current is high
  27. True
  28. resistor
  29. buzzer
  30. turns a fan or wheels
  31. False
  32. lets current go one way
  33. False
  34. beeps for an alarm
  35. senses how hot it is
  36. False
  37. buzzer
  38. capacitor
  39. False
  40. False

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