Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 83 · 40 questions

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.

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

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