Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 244 · 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.What does a buzzer do? (a) lets current go one way (b) makes things spin (c) makes a beeping sound (d) is a resistance knob
2. 2.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a resistor (d) a diode
3. 3.🧩 Which component senses how bright it is? (a) transistor (b) buzzer (c) diode (d) LDR
4. 4.True or false: a motor turns a fan or wheels. (a) False (b) True
5. 5.What does a motor do? (a) senses how hot it is (b) smooths a wobbly supply (c) turns a fan or wheels (d) glows using little power
6. 6.What does a thermistor do? (a) is a resistance knob (b) smooths a wobbly supply (c) senses how hot it is (d) blows if current is high
7. 7.🧩 Which component stores a little charge? (a) LED (b) capacitor (c) fuse (d) transistor
8. 8.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
9. 9.What does a diode do? (a) boosts a small signal (b) smooths a wobbly supply (c) blows if current is high (d) lets current go one way
10. 10.True or false: a resistor blows if current is high. (a) True (b) False
11. 11.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
12. 12.What does a fuse do? (a) smooths a wobbly supply (b) glows using little power (c) has coloured bands (d) blows if current is high
13. 13.What does an LDR do? (a) glows using little power (b) blows if current is high (c) limits the current (d) senses how bright it is
14. 14.🧩 Which component senses how hot it is? (a) LDR (b) potentiometer (c) resistor (d) thermistor
15. 15.🧩 Which component makes a beeping sound? (a) capacitor (b) motor (c) LED (d) buzzer
16. 16.True or false: a transistor smooths a wobbly supply. (a) False (b) True
17. 17.What does a capacitor do? (a) senses how hot it is (b) smooths a wobbly supply (c) turns a fan or wheels (d) makes a beeping sound
18. 18.🧩 Which component lets current go one way? (a) fuse (b) thermistor (c) buzzer (d) diode
19. 19.What does a resistor do? (a) limits the current (b) senses how hot it is (c) makes a beeping sound (d) is a resistance knob
20. 20.🧩 Which component turns a fan or wheels? (a) motor (b) thermistor (c) fuse (d) LDR
21. 21.True or false: an LED glows using little power. (a) True (b) False
22. 22.What does a resistor do? (a) lets current go one way (b) has coloured bands (c) beeps for an alarm (d) stores a little charge
23. 23.True or false: a capacitor stores a little charge. (a) True (b) False
24. 24.What does a capacitor do? (a) lets current go one way (b) stores a little charge (c) senses how bright it is (d) makes things spin
25. 25.What does a transistor do? (a) stores a little charge (b) lets current go one way (c) turns a fan or wheels (d) boosts a small signal
26. 26.True or false: a potentiometer senses how hot it is. (a) True (b) False
27. 27.🧩 Which component boosts a small signal? (a) transistor (b) potentiometer (c) motor (d) LDR
28. 28.🧩 Which component blows if current is high? (a) buzzer (b) diode (c) potentiometer (d) fuse
29. 29.True or false: a resistor has coloured bands. (a) True (b) False
30. 30.🧩 Which component makes things spin? (a) potentiometer (b) motor (c) diode (d) LDR
31. 31.🧩 Which component is a resistance knob? (a) potentiometer (b) thermistor (c) capacitor (d) motor
32. 32.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
33. 33.What does an LED do? (a) lets current go one way (b) glows using little power (c) stores a little charge (d) smooths a wobbly supply
34. 34.True or false: a motor beeps for an alarm. (a) False (b) True
35. 35.🧩 Which component beeps for an alarm? (a) thermistor (b) motor (c) transistor (d) buzzer
36. 36.🧩 Which component limits the current? (a) resistor (b) capacitor (c) LED (d) diode
37. 37.What does a motor do? (a) senses how hot it is (b) boosts a small signal (c) makes things spin (d) lets current go one way
38. 38.True or false: a resistor lets current go one way. (a) True (b) False
39. 39.True or false: a resistor beeps for an alarm. (a) True (b) False
40. 40.True or false: a transistor boosts a small signal. (a) False (b) True

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