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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 699 · 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) store charge briefly (d) make light
  2. 2.🧩 Which component boosts a small signal? (a) LED (b) buzzer (c) transistor (d) capacitor
  3. 3.🧩 Which component makes a beeping sound? (a) LED (b) buzzer (c) diode (d) potentiometer
  4. 4.True or false: a capacitor boosts a small signal. (a) True (b) False
  5. 5.True or false: a capacitor makes things spin. (a) True (b) False
  6. 6.🧩 Which component stores a little charge? (a) capacitor (b) buzzer (c) LDR (d) diode
  7. 7.True or false: a potentiometer is a resistance knob. (a) True (b) False
  8. 8.🧩 Which component beeps for an alarm? (a) LED (b) motor (c) resistor (d) buzzer
  9. 9.True or false: a resistor glows using little power. (a) True (b) False
  10. 10.🧩 Which component makes things spin? (a) LDR (b) thermistor (c) fuse (d) motor
  11. 11.True or false: a buzzer is a resistance knob. (a) False (b) True
  12. 12.What does a capacitor do? (a) blows if current is high (b) is a resistance knob (c) smooths a wobbly supply (d) senses how hot it is
  13. 13.True or false: an LED senses how hot it is. (a) False (b) True
  14. 14.🧩 Which component turns a fan or wheels? (a) LDR (b) capacitor (c) motor (d) LED
  15. 15.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
  16. 16.True or false: a capacitor blows if current is high. (a) False (b) True
  17. 17.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) a motor (d) an LED
  18. 18.True or false: a buzzer lets current go one way. (a) True (b) False
  19. 19.What does a transistor do? (a) limits the current (b) makes a beeping sound (c) boosts a small signal (d) turns a fan or wheels
  20. 20.What does a thermistor do? (a) senses how hot it is (b) glows using little power (c) has coloured bands (d) makes things spin
  21. 21.🧩 Which component glows using little power? (a) LED (b) capacitor (c) buzzer (d) diode
  22. 22.True or false: a fuse limits the current. (a) True (b) False
  23. 23.What does a fuse do? (a) blows if current is high (b) glows using little power (c) makes things spin (d) makes a beeping sound
  24. 24.True or false: a diode lets current go one way. (a) False (b) True
  25. 25.What does an LED do? (a) glows using little power (b) limits the current (c) blows if current is high (d) boosts a small signal
  26. 26.True or false: a transistor beeps for an alarm. (a) False (b) True
  27. 27.🧩 Which component limits the current? (a) LDR (b) potentiometer (c) resistor (d) transistor
  28. 28.True or false: an LDR makes things spin. (a) True (b) False
  29. 29.True or false: a diode beeps for an alarm. (a) True (b) False
  30. 30.🧩 Which component has coloured bands? (a) potentiometer (b) LDR (c) resistor (d) fuse
  31. 31.🧩 Which component smooths a wobbly supply? (a) capacitor (b) diode (c) LDR (d) LED
  32. 32.What does a diode do? (a) makes things spin (b) smooths a wobbly supply (c) lets current go one way (d) glows using little power
  33. 33.What does an LDR do? (a) makes things spin (b) lets current go one way (c) senses how bright it is (d) glows using little power
  34. 34.🧩 Which component senses how bright it is? (a) transistor (b) thermistor (c) LDR (d) fuse
  35. 35.True or false: a motor stores a little charge. (a) True (b) False
  36. 36.🧩 Which component blows if current is high? (a) diode (b) fuse (c) transistor (d) motor
  37. 37.True or false: an LDR smooths a wobbly supply. (a) False (b) True
  38. 38.What does a capacitor do? (a) blows if current is high (b) stores a little charge (c) turns a fan or wheels (d) beeps for an alarm
  39. 39.🧩 Which component senses how hot it is? (a) resistor (b) LDR (c) potentiometer (d) thermistor
  40. 40.True or false: a transistor boosts a small signal. (a) True (b) False

Answer key

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

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