Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 67 · 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 has coloured bands? (a) LED (b) LDR (c) capacitor (d) resistor
2. 2.What does a thermistor do? (a) senses how hot it is (b) is a resistance knob (c) makes things spin (d) beeps for an alarm
3. 3.🧩 Which component limits the current? (a) LED (b) capacitor (c) transistor (d) resistor
4. 4.🧩 Which component makes a beeping sound? (a) buzzer (b) motor (c) potentiometer (d) LED
5. 5.True or false: an LDR senses how bright it is. (a) False (b) True
6. 6.True or false: an LDR turns a fan or wheels. (a) True (b) False
7. 7.True or false: a resistor stores a little charge. (a) False (b) True
8. 8.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) a motor (d) an LED
9. 9.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) spin a wheel (d) store charge briefly
10. 10.What does a buzzer do? (a) makes a beeping sound (b) blows if current is high (c) boosts a small signal (d) limits the current
11. 11.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a diode (d) a buzzer
12. 12.🧩 Which component smooths a wobbly supply? (a) buzzer (b) capacitor (c) thermistor (d) transistor
13. 13.True or false: a buzzer makes a beeping sound. (a) True (b) False
14. 14.True or false: a potentiometer glows using little power. (a) True (b) False
15. 15.True or false: a diode has coloured bands. (a) False (b) True
16. 16.What does an LDR do? (a) senses how bright it is (b) stores a little charge (c) smooths a wobbly supply (d) senses how hot it is
17. 17.What does a potentiometer do? (a) smooths a wobbly supply (b) senses how bright it is (c) is a resistance knob (d) stores a little charge
18. 18.True or false: a resistor smooths a wobbly supply. (a) False (b) True
19. 19.What does a resistor do? (a) lets current go one way (b) blows if current is high (c) turns a fan or wheels (d) has coloured bands
20. 20.What does a fuse do? (a) has coloured bands (b) limits the current (c) blows if current is high (d) senses how bright it is
21. 21.True or false: a potentiometer senses how bright it is. (a) True (b) False
22. 22.What does an LED do? (a) turns a fan or wheels (b) lets current go one way (c) glows using little power (d) smooths a wobbly supply
23. 23.🧩 Which component glows using little power? (a) LDR (b) resistor (c) LED (d) buzzer
24. 24.🧩 Which component beeps for an alarm? (a) buzzer (b) LED (c) motor (d) diode
25. 25.🧩 Which component is a resistance knob? (a) capacitor (b) LDR (c) potentiometer (d) thermistor
26. 26.True or false: a transistor blows if current is high. (a) False (b) True
27. 27.🧩 Which component stores a little charge? (a) buzzer (b) fuse (c) diode (d) capacitor
28. 28.🧩 Which component senses how bright it is? (a) resistor (b) transistor (c) buzzer (d) LDR
29. 29.🧩 Which component boosts a small signal? (a) motor (b) potentiometer (c) transistor (d) LDR
30. 30.What does a buzzer do? (a) makes things spin (b) beeps for an alarm (c) turns a fan or wheels (d) blows if current is high
31. 31.True or false: a thermistor senses how bright it is. (a) False (b) True
32. 32.True or false: an LED senses how bright it is. (a) False (b) True
33. 33.True or false: a capacitor stores a little charge. (a) False (b) True
34. 34.What does a transistor do? (a) boosts a small signal (b) lets current go one way (c) beeps for an alarm (d) senses how bright it is
35. 35.True or false: a resistor limits the current. (a) False (b) True
36. 36.🧩 Which component turns a fan or wheels? (a) transistor (b) capacitor (c) buzzer (d) motor
37. 37.What does a resistor do? (a) limits the current (b) smooths a wobbly supply (c) turns a fan or wheels (d) glows using little power
38. 38.What does a motor do? (a) glows using little power (b) stores a little charge (c) has coloured bands (d) turns a fan or wheels
39. 39.🧩 Which component lets current go one way? (a) fuse (b) LDR (c) diode (d) buzzer
40. 40.True or false: a resistor has coloured bands. (a) False (b) True

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