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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 715 · 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 turns a fan or wheels. (a) False (b) True
  2. 2.What does a motor do? (a) smooths a wobbly supply (b) glows using little power (c) makes things spin (d) boosts a small signal
  3. 3.🧩 Which component limits the current? (a) capacitor (b) thermistor (c) potentiometer (d) resistor
  4. 4.True or false: a transistor boosts a small signal. (a) True (b) False
  5. 5.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) store charge briefly (d) measure heat
  6. 6.🧩 Which component boosts a small signal? (a) LDR (b) LED (c) capacitor (d) transistor
  7. 7.True or false: a transistor stores a little charge. (a) True (b) False
  8. 8.What does a capacitor do? (a) has coloured bands (b) smooths a wobbly supply (c) makes a beeping sound (d) boosts a small signal
  9. 9.True or false: a resistor limits the current. (a) False (b) True
  10. 10.True or false: a resistor has coloured bands. (a) False (b) True
  11. 11.True or false: a transistor senses how bright it is. (a) True (b) False
  12. 12.What does an LED do? (a) glows using little power (b) turns a fan or wheels (c) limits the current (d) has coloured bands
  13. 13.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) a fuse (d) an LED
  14. 14.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) capacitor (c) fuse (d) LED
  15. 15.🧩 Which component stores a little charge? (a) motor (b) potentiometer (c) fuse (d) capacitor
  16. 16.What does a motor do? (a) smooths a wobbly supply (b) is a resistance knob (c) lets current go one way (d) turns a fan or wheels
  17. 17.True or false: a resistor smooths a wobbly supply. (a) True (b) False
  18. 18.What does a fuse do? (a) limits the current (b) blows if current is high (c) makes a beeping sound (d) turns a fan or wheels
  19. 19.True or false: a capacitor is a resistance knob. (a) True (b) False
  20. 20.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
  21. 21.🧩 Which component blows if current is high? (a) capacitor (b) motor (c) fuse (d) thermistor
  22. 22.What does a diode do? (a) limits the current (b) lets current go one way (c) makes a beeping sound (d) beeps for an alarm
  23. 23.True or false: a resistor turns a fan or wheels. (a) True (b) False
  24. 24.🧩 Which component has coloured bands? (a) capacitor (b) diode (c) resistor (d) buzzer
  25. 25.🧩 Which component senses how hot it is? (a) resistor (b) potentiometer (c) transistor (d) thermistor
  26. 26.🧩 Which component is a resistance knob? (a) fuse (b) potentiometer (c) transistor (d) resistor
  27. 27.True or false: a potentiometer is a resistance knob. (a) True (b) False
  28. 28.🧩 Which component makes a beeping sound? (a) buzzer (b) transistor (c) fuse (d) thermistor
  29. 29.🧩 Which component senses how bright it is? (a) buzzer (b) fuse (c) thermistor (d) LDR
  30. 30.True or false: a buzzer limits the current. (a) False (b) True
  31. 31.🧩 Which component glows using little power? (a) diode (b) LED (c) fuse (d) LDR
  32. 32.True or false: a motor makes things spin. (a) True (b) False
  33. 33.What does a transistor do? (a) boosts a small signal (b) limits the current (c) senses how bright it is (d) has coloured bands
  34. 34.What does a capacitor do? (a) lets current go one way (b) stores a little charge (c) senses how bright it is (d) limits the current
  35. 35.🧩 Which component lets current go one way? (a) LDR (b) buzzer (c) diode (d) motor
  36. 36.🧩 Which component makes things spin? (a) LDR (b) motor (c) capacitor (d) potentiometer
  37. 37.True or false: an LDR senses how bright it is. (a) False (b) True
  38. 38.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  39. 39.What does a resistor do? (a) makes things spin (b) blows if current is high (c) has coloured bands (d) is a resistance knob
  40. 40.What does a thermistor do? (a) smooths a wobbly supply (b) beeps for an alarm (c) senses how hot it is (d) blows if current is high

Answer key

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

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