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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 316 · 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) stores a little charge (b) blows if current is high (c) lets current go one way (d) senses how bright it is
  2. 2.True or false: a resistor limits the current. (a) False (b) True
  3. 3.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a capacitor (d) a diode
  4. 4.True or false: a fuse limits the current. (a) True (b) False
  5. 5.True or false: a fuse blows if current is high. (a) True (b) False
  6. 6.What does a thermistor do? (a) glows using little power (b) beeps for an alarm (c) senses how hot it is (d) boosts a small signal
  7. 7.🧩 Which component has coloured bands? (a) potentiometer (b) capacitor (c) resistor (d) LDR
  8. 8.What does a transistor do? (a) boosts a small signal (b) beeps for an alarm (c) glows using little power (d) smooths a wobbly supply
  9. 9.True or false: a motor makes things spin. (a) False (b) True
  10. 10.What does an LED do? (a) smooths a wobbly supply (b) glows using little power (c) makes a beeping sound (d) makes things spin
  11. 11.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) make light (d) spin a wheel
  12. 12.What does a capacitor do? (a) limits the current (b) stores a little charge (c) makes a beeping sound (d) boosts a small signal
  13. 13.What does a potentiometer do? (a) makes things spin (b) senses how hot it is (c) is a resistance knob (d) has coloured bands
  14. 14.True or false: a capacitor stores a little charge. (a) False (b) True
  15. 15.True or false: an LED boosts a small signal. (a) True (b) False
  16. 16.True or false: a transistor lets current go one way. (a) True (b) False
  17. 17.🧩 Which component smooths a wobbly supply? (a) LDR (b) potentiometer (c) LED (d) capacitor
  18. 18.What does a motor do? (a) lets current go one way (b) smooths a wobbly supply (c) boosts a small signal (d) turns a fan or wheels
  19. 19.True or false: a resistor lets current go one way. (a) True (b) False
  20. 20.🧩 Which component glows using little power? (a) potentiometer (b) fuse (c) transistor (d) LED
  21. 21.True or false: a diode lets current go one way. (a) True (b) False
  22. 22.True or false: a buzzer beeps for an alarm. (a) True (b) False
  23. 23.What does a buzzer do? (a) senses how hot it is (b) beeps for an alarm (c) is a resistance knob (d) lets current go one way
  24. 24.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
  25. 25.True or false: a diode makes things spin. (a) True (b) False
  26. 26.🧩 Which component is a resistance knob? (a) capacitor (b) resistor (c) potentiometer (d) LED
  27. 27.True or false: an LDR senses how bright it is. (a) True (b) False
  28. 28.True or false: an LED glows using little power. (a) False (b) True
  29. 29.True or false: a capacitor blows if current is high. (a) True (b) False
  30. 30.What does an LDR do? (a) senses how bright it is (b) boosts a small signal (c) blows if current is high (d) turns a fan or wheels
  31. 31.🧩 Which component stores a little charge? (a) capacitor (b) motor (c) fuse (d) diode
  32. 32.True or false: a thermistor senses how hot it is. (a) True (b) False
  33. 33.🧩 Which component limits the current? (a) potentiometer (b) motor (c) resistor (d) diode
  34. 34.🧩 Which component lets current go one way? (a) diode (b) capacitor (c) LDR (d) LED
  35. 35.What does a motor do? (a) makes things spin (b) is a resistance knob (c) makes a beeping sound (d) lets current go one way
  36. 36.What does a buzzer do? (a) makes a beeping sound (b) boosts a small signal (c) turns a fan or wheels (d) lets current go one way
  37. 37.What does a resistor do? (a) makes a beeping sound (b) limits the current (c) senses how bright it is (d) smooths a wobbly supply
  38. 38.True or false: a capacitor has coloured bands. (a) False (b) True
  39. 39.True or false: a buzzer stores a little charge. (a) False (b) True
  40. 40.🧩 Which component makes things spin? (a) buzzer (b) fuse (c) motor (d) transistor

Answer key

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

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