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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 511 · 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 senses how bright it is? (a) resistor (b) transistor (c) LDR (d) capacitor
  2. 2.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) a resistor (d) an LED
  3. 3.True or false: a fuse blows if current is high. (a) True (b) False
  4. 4.🧩 Which component makes a beeping sound? (a) LDR (b) motor (c) resistor (d) buzzer
  5. 5.What does a transistor do? (a) limits the current (b) lets current go one way (c) turns a fan or wheels (d) boosts a small signal
  6. 6.What does a motor do? (a) makes things spin (b) limits the current (c) stores a little charge (d) senses how hot it is
  7. 7.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a buzzer (d) a diode
  8. 8.🧩 Which component has coloured bands? (a) fuse (b) LED (c) resistor (d) buzzer
  9. 9.True or false: a buzzer beeps for an alarm. (a) True (b) False
  10. 10.What does a fuse do? (a) makes a beeping sound (b) turns a fan or wheels (c) blows if current is high (d) limits the current
  11. 11.What does a buzzer do? (a) limits the current (b) beeps for an alarm (c) makes things spin (d) lets current go one way
  12. 12.🧩 Which component stores a little charge? (a) resistor (b) transistor (c) capacitor (d) thermistor
  13. 13.What does a potentiometer do? (a) senses how bright it is (b) limits the current (c) is a resistance knob (d) beeps for an alarm
  14. 14.What does a thermistor do? (a) limits the current (b) blows if current is high (c) boosts a small signal (d) senses how hot it is
  15. 15.🧩 Which component senses how hot it is? (a) motor (b) LDR (c) thermistor (d) capacitor
  16. 16.🧩 Which component makes things spin? (a) potentiometer (b) diode (c) LED (d) motor
  17. 17.True or false: a capacitor blows if current is high. (a) True (b) False
  18. 18.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) measure heat (d) spin a wheel
  19. 19.🧩 Which component lets current go one way? (a) thermistor (b) diode (c) buzzer (d) LDR
  20. 20.🧩 Which component beeps for an alarm? (a) LED (b) resistor (c) fuse (d) buzzer
  21. 21.True or false: a thermistor turns a fan or wheels. (a) True (b) False
  22. 22.True or false: a transistor is a resistance knob. (a) True (b) False
  23. 23.True or false: an LED makes things spin. (a) False (b) True
  24. 24.True or false: a capacitor stores a little charge. (a) True (b) False
  25. 25.🧩 Which component limits the current? (a) fuse (b) potentiometer (c) resistor (d) transistor
  26. 26.True or false: a potentiometer is a resistance knob. (a) True (b) False
  27. 27.True or false: a resistor makes things spin. (a) False (b) True
  28. 28.True or false: a thermistor senses how hot it is. (a) False (b) True
  29. 29.What does a resistor do? (a) has coloured bands (b) senses how bright it is (c) makes a beeping sound (d) is a resistance knob
  30. 30.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  31. 31.🧩 Which component boosts a small signal? (a) diode (b) motor (c) LED (d) transistor
  32. 32.What does a capacitor do? (a) beeps for an alarm (b) smooths a wobbly supply (c) limits the current (d) boosts a small signal
  33. 33.🧩 Which component is a resistance knob? (a) potentiometer (b) diode (c) capacitor (d) transistor
  34. 34.True or false: a fuse senses how hot it is. (a) True (b) False
  35. 35.True or false: an LED beeps for an alarm. (a) True (b) False
  36. 36.True or false: a resistor limits the current. (a) False (b) True
  37. 37.True or false: a potentiometer blows if current is high. (a) True (b) False
  38. 38.What does an LED do? (a) senses how hot it is (b) has coloured bands (c) glows using little power (d) is a resistance knob
  39. 39.True or false: a fuse limits the current. (a) False (b) True
  40. 40.What does a diode do? (a) makes a beeping sound (b) stores a little charge (c) lets current go one way (d) senses how hot it is

Answer key

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

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