Electronics Worksheet: Electronic Components

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

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