Electronics Worksheet: Electronic Components

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

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