Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 424 · 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) store charge briefly (b) make light (c) spin a wheel (d) measure heat
2. 2.What does a resistor do? (a) glows using little power (b) boosts a small signal (c) blows if current is high (d) limits the current
3. 3.🧩 Which component turns a fan or wheels? (a) fuse (b) LDR (c) buzzer (d) motor
4. 4.What does a motor do? (a) limits the current (b) makes a beeping sound (c) senses how hot it is (d) makes things spin
5. 5.What does an LED do? (a) makes things spin (b) glows using little power (c) has coloured bands (d) boosts a small signal
6. 6.🧩 Which component has coloured bands? (a) buzzer (b) resistor (c) LDR (d) motor
7. 7.What does an LDR do? (a) senses how bright it is (b) blows if current is high (c) makes things spin (d) has coloured bands
8. 8.What does a diode do? (a) senses how bright it is (b) limits the current (c) turns a fan or wheels (d) lets current go one way
9. 9.True or false: a transistor smooths a wobbly supply. (a) False (b) True
10. 10.What does a buzzer do? (a) makes a beeping sound (b) has coloured bands (c) glows using little power (d) is a resistance knob
11. 11.🧩 Which component makes things spin? (a) thermistor (b) transistor (c) motor (d) buzzer
12. 12.What does a motor do? (a) lets current go one way (b) stores a little charge (c) turns a fan or wheels (d) has coloured bands
13. 13.True or false: a motor makes things spin. (a) False (b) True
14. 14.What does a thermistor do? (a) limits the current (b) smooths a wobbly supply (c) senses how hot it is (d) stores a little charge
15. 15.🧩 Which component boosts a small signal? (a) LDR (b) potentiometer (c) transistor (d) LED
16. 16.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
17. 17.True or false: a capacitor senses how hot it is. (a) True (b) False
18. 18.🧩 Which component blows if current is high? (a) transistor (b) resistor (c) motor (d) fuse
19. 19.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a capacitor (d) a buzzer
20. 20.What does a fuse do? (a) smooths a wobbly supply (b) blows if current is high (c) limits the current (d) glows using little power
21. 21.What does a resistor do? (a) lets current go one way (b) is a resistance knob (c) has coloured bands (d) smooths a wobbly supply
22. 22.True or false: a diode boosts a small signal. (a) False (b) True
23. 23.True or false: a thermistor senses how hot it is. (a) True (b) False
24. 24.What does a potentiometer do? (a) makes a beeping sound (b) is a resistance knob (c) limits the current (d) boosts a small signal
25. 25.🧩 Which component stores a little charge? (a) buzzer (b) motor (c) capacitor (d) resistor
26. 26.What does a transistor do? (a) smooths a wobbly supply (b) lets current go one way (c) is a resistance knob (d) boosts a small signal
27. 27.True or false: an LED turns a fan or wheels. (a) True (b) False
28. 28.🧩 Which component smooths a wobbly supply? (a) resistor (b) buzzer (c) transistor (d) capacitor
29. 29.🧩 Which component makes a beeping sound? (a) potentiometer (b) fuse (c) buzzer (d) resistor
30. 30.True or false: a capacitor senses how bright it is. (a) False (b) True
31. 31.True or false: a motor is a resistance knob. (a) True (b) False
32. 32.🧩 Which component glows using little power? (a) buzzer (b) motor (c) transistor (d) LED
33. 33.True or false: a motor blows if current is high. (a) False (b) True
34. 34.True or false: a thermistor blows if current is high. (a) True (b) False
35. 35.True or false: an LED glows using little power. (a) True (b) False
36. 36.What does a capacitor do? (a) stores a little charge (b) glows using little power (c) senses how bright it is (d) makes things spin
37. 37.True or false: a fuse stores a little charge. (a) True (b) False
38. 38.True or false: a capacitor turns a fan or wheels. (a) True (b) False
39. 39.True or false: a capacitor stores a little charge. (a) False (b) True
40. 40.🧩 Which component is a resistance knob? (a) LED (b) motor (c) potentiometer (d) LDR

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