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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 265 · 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: an LED glows using little power. (a) True (b) False
  2. 2.🧩 Which component beeps for an alarm? (a) resistor (b) buzzer (c) potentiometer (d) LDR
  3. 3.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) store charge briefly (d) spin a wheel
  4. 4.True or false: an LDR senses how bright it is. (a) True (b) False
  5. 5.🧩 Which component smooths a wobbly supply? (a) diode (b) LDR (c) buzzer (d) capacitor
  6. 6.What does a buzzer do? (a) makes things spin (b) boosts a small signal (c) is a resistance knob (d) makes a beeping sound
  7. 7.🧩 Which component blows if current is high? (a) fuse (b) motor (c) diode (d) resistor
  8. 8.True or false: a buzzer stores a little charge. (a) True (b) False
  9. 9.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
  10. 10.What does a motor do? (a) makes things spin (b) has coloured bands (c) makes a beeping sound (d) stores a little charge
  11. 11.🧩 Which component limits the current? (a) buzzer (b) resistor (c) fuse (d) diode
  12. 12.True or false: a motor turns a fan or wheels. (a) True (b) False
  13. 13.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
  14. 14.True or false: a fuse blows if current is high. (a) False (b) True
  15. 15.🧩 Which component stores a little charge? (a) resistor (b) capacitor (c) transistor (d) diode
  16. 16.True or false: a capacitor senses how bright it is. (a) False (b) True
  17. 17.🧩 Which component makes things spin? (a) motor (b) LED (c) fuse (d) LDR
  18. 18.🧩 Which component is a resistance knob? (a) thermistor (b) potentiometer (c) transistor (d) LED
  19. 19.True or false: a resistor limits the current. (a) True (b) False
  20. 20.What does an LDR do? (a) beeps for an alarm (b) stores a little charge (c) glows using little power (d) senses how bright it is
  21. 21.True or false: a transistor boosts a small signal. (a) True (b) False
  22. 22.🧩 Which component has coloured bands? (a) buzzer (b) capacitor (c) fuse (d) resistor
  23. 23.🧩 Which component turns a fan or wheels? (a) LDR (b) motor (c) fuse (d) thermistor
  24. 24.What does a diode do? (a) makes a beeping sound (b) turns a fan or wheels (c) boosts a small signal (d) lets current go one way
  25. 25.True or false: a resistor lets current go one way. (a) True (b) False
  26. 26.What does a fuse do? (a) beeps for an alarm (b) blows if current is high (c) smooths a wobbly supply (d) senses how bright it is
  27. 27.🧩 Which component boosts a small signal? (a) transistor (b) LDR (c) capacitor (d) LED
  28. 28.🧩 Which component glows using little power? (a) transistor (b) fuse (c) LDR (d) LED
  29. 29.🧩 Which component lets current go one way? (a) diode (b) resistor (c) LDR (d) buzzer
  30. 30.What does a potentiometer do? (a) blows if current is high (b) glows using little power (c) limits the current (d) is a resistance knob
  31. 31.True or false: a capacitor lets current go one way. (a) True (b) False
  32. 32.What does a buzzer do? (a) beeps for an alarm (b) boosts a small signal (c) senses how hot it is (d) turns a fan or wheels
  33. 33.What does a resistor do? (a) smooths a wobbly supply (b) limits the current (c) blows if current is high (d) beeps for an alarm
  34. 34.True or false: a transistor makes a beeping sound. (a) True (b) False
  35. 35.What does a capacitor do? (a) senses how bright it is (b) boosts a small signal (c) blows if current is high (d) stores a little charge
  36. 36.True or false: a fuse is a resistance knob. (a) True (b) False
  37. 37.True or false: a diode lets current go one way. (a) False (b) True
  38. 38.True or false: a resistor has coloured bands. (a) False (b) True
  39. 39.True or false: a motor is a resistance knob. (a) False (b) True
  40. 40.🧩 Which component senses how bright it is? (a) buzzer (b) LDR (c) resistor (d) potentiometer

Answer key

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

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