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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 516 · 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 lets current go one way? (a) transistor (b) diode (c) LED (d) capacitor
  2. 2.What does an LED do? (a) senses how bright it is (b) lets current go one way (c) glows using little power (d) is a resistance knob
  3. 3.True or false: a buzzer beeps for an alarm. (a) False (b) True
  4. 4.True or false: a thermistor glows using little power. (a) False (b) True
  5. 5.True or false: a resistor blows if current is high. (a) True (b) False
  6. 6.What does a motor do? (a) turns a fan or wheels (b) stores a little charge (c) boosts a small signal (d) lets current go one way
  7. 7.What does a capacitor do? (a) limits the current (b) glows using little power (c) smooths a wobbly supply (d) turns a fan or wheels
  8. 8.True or false: a resistor limits the current. (a) True (b) False
  9. 9.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
  10. 10.True or false: a thermistor limits the current. (a) True (b) False
  11. 11.🧩 Which component has coloured bands? (a) resistor (b) capacitor (c) potentiometer (d) transistor
  12. 12.🧩 Which component stores a little charge? (a) LED (b) capacitor (c) thermistor (d) LDR
  13. 13.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a buzzer (d) a capacitor
  14. 14.🧩 Which component smooths a wobbly supply? (a) capacitor (b) potentiometer (c) LED (d) resistor
  15. 15.🧩 Which component beeps for an alarm? (a) potentiometer (b) LDR (c) motor (d) buzzer
  16. 16.🧩 Which component limits the current? (a) diode (b) thermistor (c) transistor (d) resistor
  17. 17.True or false: a thermistor senses how hot it is. (a) False (b) True
  18. 18.True or false: a thermistor stores a little charge. (a) True (b) False
  19. 19.True or false: a diode makes a beeping sound. (a) False (b) True
  20. 20.True or false: an LDR stores a little charge. (a) True (b) False
  21. 21.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) a resistor (d) an LED
  22. 22.🧩 Which component blows if current is high? (a) fuse (b) LDR (c) potentiometer (d) diode
  23. 23.True or false: an LED makes a beeping sound. (a) False (b) True
  24. 24.What does a transistor do? (a) stores a little charge (b) makes a beeping sound (c) smooths a wobbly supply (d) boosts a small signal
  25. 25.🧩 Which component senses how bright it is? (a) resistor (b) diode (c) LDR (d) buzzer
  26. 26.🧩 Which component glows using little power? (a) LED (b) thermistor (c) resistor (d) capacitor
  27. 27.True or false: a motor turns a fan or wheels. (a) False (b) True
  28. 28.🧩 Which component is a resistance knob? (a) resistor (b) potentiometer (c) transistor (d) capacitor
  29. 29.What does a resistor do? (a) has coloured bands (b) senses how bright it is (c) makes a beeping sound (d) beeps for an alarm
  30. 30.What does a potentiometer do? (a) makes a beeping sound (b) is a resistance knob (c) turns a fan or wheels (d) has coloured bands
  31. 31.True or false: an LDR turns a fan or wheels. (a) True (b) False
  32. 32.🧩 Which component boosts a small signal? (a) capacitor (b) diode (c) motor (d) transistor
  33. 33.🧩 Which component turns a fan or wheels? (a) motor (b) transistor (c) resistor (d) LED
  34. 34.True or false: a capacitor stores a little charge. (a) False (b) True
  35. 35.True or false: a potentiometer is a resistance knob. (a) True (b) False
  36. 36.True or false: a transistor boosts a small signal. (a) False (b) True
  37. 37.What does a motor do? (a) senses how hot it is (b) makes things spin (c) lets current go one way (d) beeps for an alarm
  38. 38.True or false: a potentiometer has coloured bands. (a) True (b) False
  39. 39.What does a thermistor do? (a) senses how hot it is (b) senses how bright it is (c) boosts a small signal (d) smooths a wobbly supply
  40. 40.What does an LDR do? (a) senses how bright it is (b) senses how hot it is (c) beeps for an alarm (d) boosts a small signal

Answer key

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

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