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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 661 · 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.🧩 Which component glows using little power? (a) motor (b) LED (c) thermistor (d) fuse
  2. 2.What does a thermistor do? (a) boosts a small signal (b) senses how bright it is (c) senses how hot it is (d) stores a little charge
  3. 3.True or false: a resistor is a resistance knob. (a) True (b) False
  4. 4.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a motor (d) a resistor
  5. 5.True or false: a motor turns a fan or wheels. (a) True (b) False
  6. 6.True or false: a thermistor blows if current is high. (a) False (b) True
  7. 7.What does an LED do? (a) senses how hot it is (b) glows using little power (c) blows if current is high (d) has coloured bands
  8. 8.🧩 Which component stores a little charge? (a) transistor (b) motor (c) diode (d) capacitor
  9. 9.True or false: an LDR senses how bright it is. (a) True (b) False
  10. 10.🧩 Which component has coloured bands? (a) LED (b) buzzer (c) resistor (d) motor
  11. 11.True or false: a resistor lets current go one way. (a) False (b) True
  12. 12.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a resistor (d) a buzzer
  13. 13.True or false: a resistor senses how bright it is. (a) False (b) True
  14. 14.True or false: a buzzer makes a beeping sound. (a) True (b) False
  15. 15.What does a potentiometer do? (a) makes things spin (b) makes a beeping sound (c) is a resistance knob (d) lets current go one way
  16. 16.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) make light (d) spin a wheel
  17. 17.True or false: a capacitor senses how hot it is. (a) True (b) False
  18. 18.🧩 Which component senses how hot it is? (a) thermistor (b) potentiometer (c) LDR (d) transistor
  19. 19.What does an LDR do? (a) has coloured bands (b) makes a beeping sound (c) stores a little charge (d) senses how bright it is
  20. 20.True or false: a transistor makes a beeping sound. (a) False (b) True
  21. 21.True or false: a fuse beeps for an alarm. (a) False (b) True
  22. 22.What does a motor do? (a) stores a little charge (b) lets current go one way (c) has coloured bands (d) makes things spin
  23. 23.🧩 Which component boosts a small signal? (a) thermistor (b) motor (c) transistor (d) LDR
  24. 24.🧩 Which component is a resistance knob? (a) thermistor (b) buzzer (c) LDR (d) potentiometer
  25. 25.True or false: a potentiometer is a resistance knob. (a) False (b) True
  26. 26.True or false: a diode lets current go one way. (a) True (b) False
  27. 27.True or false: an LDR glows using little power. (a) True (b) False
  28. 28.What does a capacitor do? (a) makes a beeping sound (b) smooths a wobbly supply (c) boosts a small signal (d) turns a fan or wheels
  29. 29.🧩 Which component blows if current is high? (a) LDR (b) motor (c) fuse (d) diode
  30. 30.What does a diode do? (a) beeps for an alarm (b) is a resistance knob (c) stores a little charge (d) lets current go one way
  31. 31.True or false: a thermistor has coloured bands. (a) False (b) True
  32. 32.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) fuse (c) capacitor (d) diode
  33. 33.🧩 Which component makes things spin? (a) motor (b) buzzer (c) transistor (d) LDR
  34. 34.What does a capacitor do? (a) makes a beeping sound (b) stores a little charge (c) blows if current is high (d) boosts a small signal
  35. 35.True or false: a potentiometer senses how bright it is. (a) False (b) True
  36. 36.🧩 Which component limits the current? (a) resistor (b) thermistor (c) fuse (d) transistor
  37. 37.True or false: a potentiometer glows using little power. (a) False (b) True
  38. 38.True or false: a resistor limits the current. (a) True (b) False
  39. 39.True or false: a capacitor stores a little charge. (a) False (b) True
  40. 40.What does a transistor do? (a) makes things spin (b) blows if current is high (c) boosts a small signal (d) beeps for an alarm

Answer key

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

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