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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 90 · 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.What does a diode do? (a) has coloured bands (b) lets current go one way (c) senses how hot it is (d) blows if current is high
  2. 2.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) an LED (d) a motor
  3. 3.What does a thermistor do? (a) senses how bright it is (b) has coloured bands (c) smooths a wobbly supply (d) senses how hot it is
  4. 4.🧩 Which component stores a little charge? (a) capacitor (b) LDR (c) LED (d) buzzer
  5. 5.🧩 Which component blows if current is high? (a) motor (b) fuse (c) LED (d) capacitor
  6. 6.True or false: a motor turns a fan or wheels. (a) True (b) False
  7. 7.What does a resistor do? (a) lets current go one way (b) makes things spin (c) limits the current (d) turns a fan or wheels
  8. 8.What does a buzzer do? (a) senses how bright it is (b) makes a beeping sound (c) stores a little charge (d) glows using little power
  9. 9.True or false: a resistor limits the current. (a) False (b) True
  10. 10.True or false: a capacitor senses how hot it is. (a) True (b) False
  11. 11.🧩 Which component senses how bright it is? (a) motor (b) LDR (c) buzzer (d) fuse
  12. 12.🧩 Which component boosts a small signal? (a) LED (b) transistor (c) LDR (d) buzzer
  13. 13.🧩 Which component lets current go one way? (a) LDR (b) motor (c) buzzer (d) diode
  14. 14.🧩 Which component smooths a wobbly supply? (a) capacitor (b) buzzer (c) LDR (d) fuse
  15. 15.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) store charge briefly (d) spin a wheel
  16. 16.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a capacitor (d) a resistor
  17. 17.🧩 Which component limits the current? (a) buzzer (b) motor (c) LDR (d) resistor
  18. 18.🧩 Which component senses how hot it is? (a) buzzer (b) LDR (c) thermistor (d) potentiometer
  19. 19.🧩 Which component has coloured bands? (a) motor (b) resistor (c) fuse (d) buzzer
  20. 20.True or false: an LDR blows if current is high. (a) False (b) True
  21. 21.True or false: a potentiometer boosts a small signal. (a) False (b) True
  22. 22.🧩 Which component makes things spin? (a) motor (b) capacitor (c) diode (d) LDR
  23. 23.True or false: a thermistor senses how hot it is. (a) True (b) False
  24. 24.True or false: a fuse boosts a small signal. (a) False (b) True
  25. 25.What does a capacitor do? (a) lets current go one way (b) senses how hot it is (c) smooths a wobbly supply (d) boosts a small signal
  26. 26.True or false: a potentiometer senses how bright it is. (a) False (b) True
  27. 27.True or false: a diode stores a little charge. (a) False (b) True
  28. 28.What does an LDR do? (a) glows using little power (b) is a resistance knob (c) senses how bright it is (d) lets current go one way
  29. 29.What does a fuse do? (a) blows if current is high (b) senses how hot it is (c) is a resistance knob (d) turns a fan or wheels
  30. 30.True or false: an LED senses how hot it is. (a) False (b) True
  31. 31.What does a potentiometer do? (a) is a resistance knob (b) senses how hot it is (c) lets current go one way (d) glows using little power
  32. 32.What does an LED do? (a) glows using little power (b) limits the current (c) boosts a small signal (d) senses how bright it is
  33. 33.What does a transistor do? (a) lets current go one way (b) smooths a wobbly supply (c) boosts a small signal (d) turns a fan or wheels
  34. 34.True or false: a capacitor has coloured bands. (a) True (b) False
  35. 35.True or false: a buzzer beeps for an alarm. (a) False (b) True
  36. 36.🧩 Which component makes a beeping sound? (a) potentiometer (b) motor (c) capacitor (d) buzzer
  37. 37.What does a motor do? (a) smooths a wobbly supply (b) boosts a small signal (c) senses how bright it is (d) makes things spin
  38. 38.What does a motor do? (a) turns a fan or wheels (b) senses how bright it is (c) has coloured bands (d) boosts a small signal
  39. 39.🧩 Which component is a resistance knob? (a) buzzer (b) capacitor (c) potentiometer (d) resistor
  40. 40.True or false: a resistor makes a beeping sound. (a) False (b) True

Answer key

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

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