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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 439 · 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) spin a wheel (b) measure heat (c) make light (d) store charge briefly
  2. 2.What does a resistor do? (a) lets current go one way (b) beeps for an alarm (c) has coloured bands (d) stores a little charge
  3. 3.What does a diode do? (a) blows if current is high (b) limits the current (c) makes things spin (d) lets current go one way
  4. 4.🧩 Which component senses how bright it is? (a) transistor (b) potentiometer (c) motor (d) LDR
  5. 5.🧩 Which component blows if current is high? (a) motor (b) LDR (c) potentiometer (d) fuse
  6. 6.What does a buzzer do? (a) beeps for an alarm (b) lets current go one way (c) smooths a wobbly supply (d) limits the current
  7. 7.True or false: an LDR limits the current. (a) True (b) False
  8. 8.🧩 Which component makes things spin? (a) LDR (b) fuse (c) capacitor (d) motor
  9. 9.True or false: a fuse blows if current is high. (a) False (b) True
  10. 10.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
  11. 11.What does a thermistor do? (a) boosts a small signal (b) senses how hot it is (c) is a resistance knob (d) glows using little power
  12. 12.What does a motor do? (a) blows if current is high (b) makes things spin (c) boosts a small signal (d) smooths a wobbly supply
  13. 13.🧩 Which component limits the current? (a) motor (b) LDR (c) resistor (d) capacitor
  14. 14.True or false: a resistor senses how hot it is. (a) False (b) True
  15. 15.🧩 Which component boosts a small signal? (a) capacitor (b) transistor (c) potentiometer (d) thermistor
  16. 16.True or false: a transistor senses how hot it is. (a) True (b) False
  17. 17.What does an LED do? (a) has coloured bands (b) glows using little power (c) stores a little charge (d) makes things spin
  18. 18.True or false: a capacitor makes things spin. (a) True (b) False
  19. 19.What does an LDR do? (a) makes things spin (b) senses how bright it is (c) senses how hot it is (d) limits the current
  20. 20.What does a transistor do? (a) boosts a small signal (b) blows if current is high (c) turns a fan or wheels (d) makes things spin
  21. 21.🧩 Which component glows using little power? (a) diode (b) thermistor (c) buzzer (d) LED
  22. 22.What does a capacitor do? (a) makes things spin (b) smooths a wobbly supply (c) beeps for an alarm (d) senses how hot it is
  23. 23.🧩 Which component lets current go one way? (a) motor (b) fuse (c) diode (d) resistor
  24. 24.🧩 Which component stores a little charge? (a) motor (b) thermistor (c) potentiometer (d) capacitor
  25. 25.True or false: a resistor has coloured bands. (a) True (b) False
  26. 26.True or false: a transistor boosts a small signal. (a) False (b) True
  27. 27.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
  28. 28.What does a fuse do? (a) boosts a small signal (b) blows if current is high (c) beeps for an alarm (d) limits the current
  29. 29.True or false: a potentiometer has coloured bands. (a) True (b) False
  30. 30.True or false: a fuse turns a fan or wheels. (a) False (b) True
  31. 31.🧩 Which component is a resistance knob? (a) capacitor (b) buzzer (c) potentiometer (d) LED
  32. 32.True or false: a resistor limits the current. (a) True (b) False
  33. 33.True or false: an LED glows using little power. (a) True (b) False
  34. 34.True or false: a resistor blows if current is high. (a) True (b) False
  35. 35.True or false: a diode glows using little power. (a) False (b) True
  36. 36.What does a potentiometer do? (a) has coloured bands (b) makes a beeping sound (c) is a resistance knob (d) stores a little charge
  37. 37.True or false: a motor makes things spin. (a) False (b) True
  38. 38.True or false: a potentiometer blows if current is high. (a) True (b) False
  39. 39.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  40. 40.True or false: a buzzer beeps for an alarm. (a) False (b) True

Answer key

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

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