Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 191 · 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 is a resistance knob? (a) potentiometer (b) LED (c) transistor (d) motor
2. 2.What does a motor do? (a) is a resistance knob (b) makes things spin (c) senses how bright it is (d) blows if current is high
3. 3.🧩 A capacitor in a circuit can … (a) store charge briefly (b) spin a wheel (c) make light (d) measure heat
4. 4.True or false: an LDR blows if current is high. (a) True (b) False
5. 5.What does a capacitor do? (a) is a resistance knob (b) blows if current is high (c) stores a little charge (d) boosts a small signal
6. 6.🧩 Which component limits the current? (a) capacitor (b) potentiometer (c) motor (d) resistor
7. 7.🧩 Which component turns a fan or wheels? (a) motor (b) capacitor (c) fuse (d) LED
8. 8.🧩 Which component beeps for an alarm? (a) buzzer (b) thermistor (c) capacitor (d) fuse
9. 9.What does a thermistor do? (a) beeps for an alarm (b) boosts a small signal (c) blows if current is high (d) senses how hot it is
10. 10.What does an LED do? (a) smooths a wobbly supply (b) glows using little power (c) boosts a small signal (d) makes things spin
11. 11.True or false: a fuse blows if current is high. (a) True (b) False
12. 12.What does a fuse do? (a) blows if current is high (b) stores a little charge (c) glows using little power (d) smooths a wobbly supply
13. 13.🧩 Which component has coloured bands? (a) diode (b) resistor (c) potentiometer (d) fuse
14. 14.True or false: a diode limits the current. (a) False (b) True
15. 15.🧩 Which component senses how hot it is? (a) fuse (b) thermistor (c) buzzer (d) LED
16. 16.True or false: a motor boosts a small signal. (a) True (b) False
17. 17.True or false: a diode beeps for an alarm. (a) False (b) True
18. 18.What does a buzzer do? (a) has coloured bands (b) beeps for an alarm (c) blows if current is high (d) lets current go one way
19. 19.What does a diode do? (a) lets current go one way (b) senses how hot it is (c) turns a fan or wheels (d) blows if current is high
20. 20.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) a resistor (d) an LED
21. 21.True or false: a potentiometer makes a beeping sound. (a) False (b) True
22. 22.What does an LDR do? (a) smooths a wobbly supply (b) blows if current is high (c) is a resistance knob (d) senses how bright it is
23. 23.🧩 Which component blows if current is high? (a) buzzer (b) transistor (c) LDR (d) fuse
24. 24.What does a motor do? (a) boosts a small signal (b) smooths a wobbly supply (c) turns a fan or wheels (d) blows if current is high
25. 25.True or false: a fuse senses how bright it is. (a) True (b) False
26. 26.True or false: an LED glows using little power. (a) False (b) True
27. 27.True or false: a motor makes things spin. (a) False (b) True
28. 28.🧩 Which component lets current go one way? (a) fuse (b) diode (c) buzzer (d) potentiometer
29. 29.True or false: a potentiometer blows if current is high. (a) False (b) True
30. 30.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a capacitor (d) a buzzer
31. 31.🧩 Which component makes things spin? (a) LDR (b) fuse (c) motor (d) buzzer
32. 32.🧩 Which component glows using little power? (a) LED (b) resistor (c) fuse (d) transistor
33. 33.What does a transistor do? (a) lets current go one way (b) has coloured bands (c) boosts a small signal (d) blows if current is high
34. 34.What does a resistor do? (a) limits the current (b) turns a fan or wheels (c) is a resistance knob (d) beeps for an alarm
35. 35.🧩 Which component stores a little charge? (a) potentiometer (b) capacitor (c) resistor (d) fuse
36. 36.True or false: an LED smooths a wobbly supply. (a) True (b) False
37. 37.What does a potentiometer do? (a) blows if current is high (b) smooths a wobbly supply (c) is a resistance knob (d) turns a fan or wheels
38. 38.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) resistor (c) capacitor (d) transistor
39. 39.True or false: a thermistor glows using little power. (a) False (b) True
40. 40.True or false: an LDR beeps for an alarm. (a) False (b) True

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