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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 148 · 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) make light (d) measure heat
  2. 2.What does a motor do? (a) is a resistance knob (b) senses how bright it is (c) turns a fan or wheels (d) has coloured bands
  3. 3.True or false: a resistor has coloured bands. (a) False (b) True
  4. 4.What does a transistor do? (a) senses how hot it is (b) stores a little charge (c) blows if current is high (d) boosts a small signal
  5. 5.🧩 Which component blows if current is high? (a) resistor (b) thermistor (c) LED (d) fuse
  6. 6.True or false: a capacitor stores a little charge. (a) True (b) False
  7. 7.What does a diode do? (a) turns a fan or wheels (b) makes a beeping sound (c) smooths a wobbly supply (d) lets current go one way
  8. 8.🧩 Which component limits the current? (a) LDR (b) buzzer (c) LED (d) resistor
  9. 9.What does a capacitor do? (a) boosts a small signal (b) makes things spin (c) is a resistance knob (d) stores a little charge
  10. 10.🧩 Which component smooths a wobbly supply? (a) resistor (b) LED (c) capacitor (d) buzzer
  11. 11.🧩 Which component lets current go one way? (a) resistor (b) diode (c) capacitor (d) LDR
  12. 12.True or false: a motor smooths a wobbly supply. (a) True (b) False
  13. 13.🧩 Which component stores a little charge? (a) diode (b) LED (c) capacitor (d) transistor
  14. 14.What does a fuse do? (a) has coloured bands (b) senses how bright it is (c) blows if current is high (d) smooths a wobbly supply
  15. 15.True or false: a resistor limits the current. (a) False (b) True
  16. 16.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) an LED (d) a motor
  17. 17.True or false: a buzzer smooths a wobbly supply. (a) True (b) False
  18. 18.True or false: a buzzer makes a beeping sound. (a) True (b) False
  19. 19.🧩 Which component is a resistance knob? (a) potentiometer (b) LDR (c) diode (d) fuse
  20. 20.True or false: a motor makes things spin. (a) True (b) False
  21. 21.What does a buzzer do? (a) senses how bright it is (b) beeps for an alarm (c) stores a little charge (d) makes things spin
  22. 22.What does an LDR do? (a) senses how bright it is (b) makes things spin (c) blows if current is high (d) is a resistance knob
  23. 23.What does a thermistor do? (a) senses how hot it is (b) smooths a wobbly supply (c) makes things spin (d) senses how bright it is
  24. 24.🧩 Which component has coloured bands? (a) LDR (b) resistor (c) thermistor (d) LED
  25. 25.What does a buzzer do? (a) smooths a wobbly supply (b) senses how hot it is (c) makes a beeping sound (d) glows using little power
  26. 26.What does a potentiometer do? (a) stores a little charge (b) lets current go one way (c) makes things spin (d) is a resistance knob
  27. 27.True or false: a buzzer glows using little power. (a) True (b) False
  28. 28.True or false: a capacitor makes things spin. (a) True (b) False
  29. 29.True or false: a motor makes a beeping sound. (a) True (b) False
  30. 30.True or false: a fuse lets current go one way. (a) True (b) False
  31. 31.🧩 Which component senses how bright it is? (a) potentiometer (b) resistor (c) LDR (d) LED
  32. 32.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a buzzer (d) a diode
  33. 33.What does a resistor do? (a) smooths a wobbly supply (b) is a resistance knob (c) makes things spin (d) limits the current
  34. 34.What does a capacitor do? (a) senses how bright it is (b) glows using little power (c) smooths a wobbly supply (d) blows if current is high
  35. 35.True or false: a resistor boosts a small signal. (a) True (b) False
  36. 36.True or false: a diode lets current go one way. (a) False (b) True
  37. 37.True or false: a potentiometer has coloured bands. (a) False (b) True
  38. 38.🧩 Which component glows using little power? (a) diode (b) fuse (c) potentiometer (d) LED
  39. 39.True or false: a transistor has coloured bands. (a) True (b) False
  40. 40.🧩 Which component senses how hot it is? (a) motor (b) transistor (c) thermistor (d) diode

Answer key

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

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