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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 209 · 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 limits the current? (a) buzzer (b) capacitor (c) resistor (d) motor
  2. 2.🧩 Which component lets current go one way? (a) diode (b) thermistor (c) potentiometer (d) buzzer
  3. 3.🧩 A capacitor in a circuit can … (a) store charge briefly (b) spin a wheel (c) make light (d) measure heat
  4. 4.🧩 Which component is a resistance knob? (a) buzzer (b) LDR (c) thermistor (d) potentiometer
  5. 5.What does a resistor do? (a) has coloured bands (b) is a resistance knob (c) senses how hot it is (d) beeps for an alarm
  6. 6.True or false: a motor makes things spin. (a) True (b) False
  7. 7.True or false: a resistor has coloured bands. (a) False (b) True
  8. 8.What does a diode do? (a) boosts a small signal (b) stores a little charge (c) glows using little power (d) lets current go one way
  9. 9.What does an LDR do? (a) has coloured bands (b) senses how bright it is (c) lets current go one way (d) stores a little charge
  10. 10.True or false: a resistor is a resistance knob. (a) True (b) False
  11. 11.What does a buzzer do? (a) boosts a small signal (b) beeps for an alarm (c) blows if current is high (d) smooths a wobbly supply
  12. 12.True or false: a capacitor senses how bright it is. (a) False (b) True
  13. 13.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a motor (d) a resistor
  14. 14.What does a potentiometer do? (a) makes things spin (b) is a resistance knob (c) turns a fan or wheels (d) glows using little power
  15. 15.🧩 Which component senses how hot it is? (a) transistor (b) LDR (c) diode (d) thermistor
  16. 16.True or false: a diode lets current go one way. (a) True (b) False
  17. 17.True or false: a transistor is a resistance knob. (a) False (b) True
  18. 18.🧩 Which component has coloured bands? (a) potentiometer (b) thermistor (c) buzzer (d) resistor
  19. 19.True or false: a transistor boosts a small signal. (a) True (b) False
  20. 20.True or false: a resistor stores a little charge. (a) False (b) True
  21. 21.What does a resistor do? (a) limits the current (b) turns a fan or wheels (c) stores a little charge (d) senses how hot it is
  22. 22.🧩 Which component makes things spin? (a) capacitor (b) fuse (c) motor (d) LED
  23. 23.🧩 Which component smooths a wobbly supply? (a) resistor (b) motor (c) potentiometer (d) capacitor
  24. 24.🧩 Which component stores a little charge? (a) fuse (b) capacitor (c) buzzer (d) thermistor
  25. 25.What does a buzzer do? (a) glows using little power (b) makes a beeping sound (c) senses how hot it is (d) smooths a wobbly supply
  26. 26.What does an LED do? (a) smooths a wobbly supply (b) makes things spin (c) senses how hot it is (d) glows using little power
  27. 27.True or false: a resistor limits the current. (a) True (b) False
  28. 28.🧩 Which component senses how bright it is? (a) buzzer (b) capacitor (c) thermistor (d) LDR
  29. 29.What does a fuse do? (a) senses how hot it is (b) blows if current is high (c) smooths a wobbly supply (d) glows using little power
  30. 30.True or false: a capacitor lets current go one way. (a) True (b) False
  31. 31.True or false: an LDR senses how bright it is. (a) False (b) True
  32. 32.True or false: a thermistor senses how hot it is. (a) True (b) False
  33. 33.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a resistor (d) a buzzer
  34. 34.True or false: a fuse blows if current is high. (a) True (b) False
  35. 35.🧩 Which component makes a beeping sound? (a) fuse (b) buzzer (c) motor (d) transistor
  36. 36.🧩 Which component glows using little power? (a) transistor (b) LED (c) fuse (d) capacitor
  37. 37.True or false: a motor turns a fan or wheels. (a) False (b) True
  38. 38.True or false: a thermistor stores a little charge. (a) False (b) True
  39. 39.What does a capacitor do? (a) is a resistance knob (b) glows using little power (c) stores a little charge (d) makes things spin
  40. 40.What does a capacitor do? (a) blows if current is high (b) smooths a wobbly supply (c) limits the current (d) boosts a small signal

Answer key

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

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