Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 180 · 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) make light (b) spin a wheel (c) measure heat (d) store charge briefly
2. 2.What does a fuse do? (a) smooths a wobbly supply (b) stores a little charge (c) beeps for an alarm (d) blows if current is high
3. 3.🧩 Which component stores a little charge? (a) capacitor (b) thermistor (c) LED (d) potentiometer
4. 4.What does a capacitor do? (a) blows if current is high (b) smooths a wobbly supply (c) beeps for an alarm (d) turns a fan or wheels
5. 5.🧩 Which component beeps for an alarm? (a) buzzer (b) resistor (c) diode (d) LED
6. 6.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a buzzer (d) a diode
7. 7.True or false: an LDR senses how bright it is. (a) False (b) True
8. 8.What does a transistor do? (a) turns a fan or wheels (b) lets current go one way (c) boosts a small signal (d) has coloured bands
9. 9.🧩 Which component has coloured bands? (a) fuse (b) transistor (c) capacitor (d) resistor
10. 10.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) a resistor (d) an LED
11. 11.🧩 Which component is a resistance knob? (a) LED (b) transistor (c) diode (d) potentiometer
12. 12.True or false: a motor makes things spin. (a) False (b) True
13. 13.🧩 Which component turns a fan or wheels? (a) capacitor (b) LDR (c) motor (d) LED
14. 14.True or false: a transistor turns a fan or wheels. (a) False (b) True
15. 15.🧩 Which component glows using little power? (a) buzzer (b) thermistor (c) LED (d) LDR
16. 16.What does a resistor do? (a) limits the current (b) senses how hot it is (c) glows using little power (d) lets current go one way
17. 17.🧩 Which component blows if current is high? (a) resistor (b) potentiometer (c) diode (d) fuse
18. 18.🧩 Which component makes a beeping sound? (a) buzzer (b) potentiometer (c) fuse (d) motor
19. 19.🧩 Which component limits the current? (a) buzzer (b) motor (c) resistor (d) thermistor
20. 20.🧩 Which component makes things spin? (a) diode (b) fuse (c) potentiometer (d) motor
21. 21.🧩 Which component senses how bright it is? (a) capacitor (b) transistor (c) resistor (d) LDR
22. 22.What does a motor do? (a) glows using little power (b) limits the current (c) beeps for an alarm (d) makes things spin
23. 23.What does a resistor do? (a) makes things spin (b) has coloured bands (c) lets current go one way (d) senses how hot it is
24. 24.What does an LED do? (a) boosts a small signal (b) beeps for an alarm (c) limits the current (d) glows using little power
25. 25.True or false: a capacitor stores a little charge. (a) False (b) True
26. 26.True or false: a motor blows if current is high. (a) False (b) True
27. 27.What does an LDR do? (a) stores a little charge (b) turns a fan or wheels (c) senses how bright it is (d) beeps for an alarm
28. 28.True or false: a capacitor boosts a small signal. (a) True (b) False
29. 29.🧩 Which component boosts a small signal? (a) LED (b) transistor (c) fuse (d) resistor
30. 30.True or false: an LDR limits the current. (a) True (b) False
31. 31.What does a diode do? (a) stores a little charge (b) lets current go one way (c) makes a beeping sound (d) smooths a wobbly supply
32. 32.True or false: a diode senses how bright it is. (a) False (b) True
33. 33.🧩 Which component smooths a wobbly supply? (a) fuse (b) buzzer (c) capacitor (d) LDR
34. 34.True or false: a resistor beeps for an alarm. (a) False (b) True
35. 35.True or false: a resistor limits the current. (a) False (b) True
36. 36.True or false: an LDR lets current go one way. (a) False (b) True
37. 37.What does a buzzer do? (a) senses how bright it is (b) makes a beeping sound (c) smooths a wobbly supply (d) has coloured bands
38. 38.True or false: a capacitor limits the current. (a) True (b) False
39. 39.🧩 Which component lets current go one way? (a) transistor (b) thermistor (c) diode (d) LDR
40. 40.What does a motor do? (a) is a resistance knob (b) lets current go one way (c) turns a fan or wheels (d) smooths a wobbly supply

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