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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 367 · 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 part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a diode (d) a resistor
  2. 2.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) capacitor (c) resistor (d) thermistor
  3. 3.True or false: a transistor makes things spin. (a) False (b) True
  4. 4.What does a diode do? (a) boosts a small signal (b) stores a little charge (c) lets current go one way (d) beeps for an alarm
  5. 5.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
  6. 6.🧩 Which component lets current go one way? (a) motor (b) resistor (c) diode (d) potentiometer
  7. 7.🧩 Which component senses how bright it is? (a) LDR (b) LED (c) buzzer (d) resistor
  8. 8.True or false: a motor turns a fan or wheels. (a) True (b) False
  9. 9.🧩 Which component turns a fan or wheels? (a) LED (b) motor (c) potentiometer (d) resistor
  10. 10.True or false: a transistor glows using little power. (a) True (b) False
  11. 11.🧩 Which component blows if current is high? (a) diode (b) fuse (c) motor (d) potentiometer
  12. 12.What does an LED do? (a) glows using little power (b) lets current go one way (c) boosts a small signal (d) blows if current is high
  13. 13.🧩 Which component glows using little power? (a) LDR (b) diode (c) capacitor (d) LED
  14. 14.What does a motor do? (a) is a resistance knob (b) lets current go one way (c) senses how hot it is (d) turns a fan or wheels
  15. 15.🧩 Which component stores a little charge? (a) diode (b) LDR (c) resistor (d) capacitor
  16. 16.What does a potentiometer do? (a) makes things spin (b) is a resistance knob (c) turns a fan or wheels (d) limits the current
  17. 17.True or false: a resistor lets current go one way. (a) True (b) False
  18. 18.True or false: a diode stores a little charge. (a) True (b) False
  19. 19.What does a resistor do? (a) glows using little power (b) lets current go one way (c) turns a fan or wheels (d) has coloured bands
  20. 20.True or false: a fuse stores a little charge. (a) False (b) True
  21. 21.True or false: a diode makes things spin. (a) True (b) False
  22. 22.True or false: a capacitor stores a little charge. (a) False (b) True
  23. 23.🧩 Which component is a resistance knob? (a) motor (b) capacitor (c) potentiometer (d) fuse
  24. 24.True or false: a potentiometer senses how bright it is. (a) False (b) True
  25. 25.True or false: a fuse blows if current is high. (a) False (b) True
  26. 26.True or false: a resistor turns a fan or wheels. (a) True (b) False
  27. 27.True or false: a potentiometer smooths a wobbly supply. (a) True (b) False
  28. 28.🧩 Which component senses how hot it is? (a) motor (b) buzzer (c) thermistor (d) transistor
  29. 29.True or false: a diode lets current go one way. (a) False (b) True
  30. 30.🧩 Which component beeps for an alarm? (a) transistor (b) capacitor (c) resistor (d) buzzer
  31. 31.True or false: a capacitor lets current go one way. (a) True (b) False
  32. 32.What does an LDR do? (a) smooths a wobbly supply (b) senses how bright it is (c) makes a beeping sound (d) beeps for an alarm
  33. 33.🧩 Which component boosts a small signal? (a) capacitor (b) buzzer (c) transistor (d) resistor
  34. 34.🧩 Which component has coloured bands? (a) thermistor (b) potentiometer (c) diode (d) resistor
  35. 35.What does a transistor do? (a) has coloured bands (b) is a resistance knob (c) stores a little charge (d) boosts a small signal
  36. 36.True or false: a resistor limits the current. (a) True (b) False
  37. 37.What does a capacitor do? (a) boosts a small signal (b) senses how bright it is (c) stores a little charge (d) is a resistance knob
  38. 38.True or false: a potentiometer glows using little power. (a) True (b) False
  39. 39.True or false: an LDR senses how bright it is. (a) False (b) True
  40. 40.True or false: a buzzer beeps for an alarm. (a) False (b) True

Answer key

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

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