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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 542 · 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.🧩 A capacitor in a circuit can … (a) store charge briefly (b) spin a wheel (c) measure heat (d) make light
  2. 2.🧩 Which component stores a little charge? (a) transistor (b) diode (c) capacitor (d) LDR
  3. 3.🧩 Which component lets current go one way? (a) capacitor (b) fuse (c) diode (d) motor
  4. 4.True or false: a motor glows using little power. (a) True (b) False
  5. 5.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a fuse (d) a motor
  6. 6.True or false: an LDR senses how bright it is. (a) True (b) False
  7. 7.🧩 Which component has coloured bands? (a) resistor (b) motor (c) LED (d) thermistor
  8. 8.True or false: a capacitor stores a little charge. (a) True (b) False
  9. 9.🧩 Which component is a resistance knob? (a) potentiometer (b) diode (c) motor (d) buzzer
  10. 10.True or false: a diode lets current go one way. (a) False (b) True
  11. 11.What does a thermistor do? (a) beeps for an alarm (b) glows using little power (c) smooths a wobbly supply (d) senses how hot it is
  12. 12.True or false: a resistor turns a fan or wheels. (a) True (b) False
  13. 13.🧩 Which component turns a fan or wheels? (a) capacitor (b) motor (c) buzzer (d) transistor
  14. 14.What does a transistor do? (a) turns a fan or wheels (b) boosts a small signal (c) beeps for an alarm (d) blows if current is high
  15. 15.What does an LED do? (a) limits the current (b) glows using little power (c) is a resistance knob (d) smooths a wobbly supply
  16. 16.What does a motor do? (a) senses how bright it is (b) makes things spin (c) has coloured bands (d) lets current go one way
  17. 17.True or false: a buzzer lets current go one way. (a) False (b) True
  18. 18.True or false: a potentiometer is a resistance knob. (a) False (b) True
  19. 19.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a diode (d) a buzzer
  20. 20.🧩 Which component senses how hot it is? (a) buzzer (b) thermistor (c) fuse (d) diode
  21. 21.True or false: a buzzer senses how hot it is. (a) False (b) True
  22. 22.True or false: a capacitor lets current go one way. (a) False (b) True
  23. 23.True or false: a potentiometer stores a little charge. (a) True (b) False
  24. 24.🧩 Which component blows if current is high? (a) capacitor (b) motor (c) fuse (d) diode
  25. 25.True or false: an LED glows using little power. (a) True (b) False
  26. 26.What does a capacitor do? (a) limits the current (b) blows if current is high (c) is a resistance knob (d) smooths a wobbly supply
  27. 27.What does a diode do? (a) turns a fan or wheels (b) lets current go one way (c) blows if current is high (d) boosts a small signal
  28. 28.True or false: a resistor limits the current. (a) False (b) True
  29. 29.What does a potentiometer do? (a) smooths a wobbly supply (b) is a resistance knob (c) glows using little power (d) blows if current is high
  30. 30.True or false: a motor stores a little charge. (a) True (b) False
  31. 31.True or false: a fuse is a resistance knob. (a) False (b) True
  32. 32.True or false: a motor turns a fan or wheels. (a) True (b) False
  33. 33.True or false: a resistor has coloured bands. (a) True (b) False
  34. 34.🧩 Which component makes a beeping sound? (a) motor (b) transistor (c) thermistor (d) buzzer
  35. 35.🧩 Which component beeps for an alarm? (a) resistor (b) buzzer (c) LDR (d) diode
  36. 36.True or false: an LED is a resistance knob. (a) False (b) True
  37. 37.🧩 Which component boosts a small signal? (a) transistor (b) fuse (c) capacitor (d) LDR
  38. 38.True or false: a transistor boosts a small signal. (a) False (b) True
  39. 39.What does a motor do? (a) limits the current (b) turns a fan or wheels (c) is a resistance knob (d) boosts a small signal
  40. 40.🧩 Which component smooths a wobbly supply? (a) LDR (b) motor (c) capacitor (d) resistor

Answer key

  1. store charge briefly
  2. capacitor
  3. diode
  4. False
  5. a motor
  6. True
  7. resistor
  8. True
  9. potentiometer
  10. True
  11. senses how hot it is
  12. False
  13. motor
  14. boosts a small signal
  15. glows using little power
  16. makes things spin
  17. False
  18. True
  19. a buzzer
  20. thermistor
  21. False
  22. False
  23. False
  24. fuse
  25. True
  26. smooths a wobbly supply
  27. lets current go one way
  28. True
  29. is a resistance knob
  30. False
  31. False
  32. True
  33. True
  34. buzzer
  35. buzzer
  36. False
  37. transistor
  38. True
  39. turns a fan or wheels
  40. capacitor

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