Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 531 · 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 smooths a wobbly supply? (a) LDR (b) buzzer (c) capacitor (d) fuse
2. 2.🧩 Which component makes a beeping sound? (a) diode (b) fuse (c) transistor (d) buzzer
3. 3.🧩 Which component glows using little power? (a) LED (b) diode (c) buzzer (d) motor
4. 4.🧩 Which part changes electrical energy into movement? (a) an LED (b) a fuse (c) a resistor (d) a motor
5. 5.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a resistor (d) a diode
6. 6.🧩 Which component lets current go one way? (a) buzzer (b) LDR (c) diode (d) motor
7. 7.True or false: a resistor has coloured bands. (a) False (b) True
8. 8.What does a fuse do? (a) glows using little power (b) is a resistance knob (c) blows if current is high (d) senses how hot it is
9. 9.What does a diode do? (a) limits the current (b) lets current go one way (c) boosts a small signal (d) smooths a wobbly supply
10. 10.🧩 A capacitor in a circuit can … (a) store charge briefly (b) spin a wheel (c) measure heat (d) make light
11. 11.What does a resistor do? (a) has coloured bands (b) stores a little charge (c) smooths a wobbly supply (d) turns a fan or wheels
12. 12.🧩 Which component blows if current is high? (a) capacitor (b) fuse (c) resistor (d) motor
13. 13.True or false: an LED beeps for an alarm. (a) False (b) True
14. 14.🧩 Which component senses how hot it is? (a) thermistor (b) LED (c) motor (d) capacitor
15. 15.True or false: a capacitor blows if current is high. (a) False (b) True
16. 16.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
17. 17.What does an LDR do? (a) blows if current is high (b) glows using little power (c) senses how hot it is (d) senses how bright it is
18. 18.What does a resistor do? (a) beeps for an alarm (b) is a resistance knob (c) smooths a wobbly supply (d) limits the current
19. 19.What does a transistor do? (a) boosts a small signal (b) is a resistance knob (c) glows using little power (d) blows if current is high
20. 20.True or false: a resistor limits the current. (a) False (b) True
21. 21.🧩 Which component makes things spin? (a) potentiometer (b) motor (c) buzzer (d) thermistor
22. 22.What does a potentiometer do? (a) is a resistance knob (b) boosts a small signal (c) has coloured bands (d) limits the current
23. 23.What does a thermistor do? (a) stores a little charge (b) limits the current (c) smooths a wobbly supply (d) senses how hot it is
24. 24.🧩 Which component is a resistance knob? (a) potentiometer (b) LDR (c) buzzer (d) transistor
25. 25.🧩 Which component boosts a small signal? (a) LED (b) buzzer (c) thermistor (d) transistor
26. 26.True or false: a resistor makes a beeping sound. (a) False (b) True
27. 27.🧩 Which component beeps for an alarm? (a) transistor (b) buzzer (c) motor (d) thermistor
28. 28.True or false: a diode has coloured bands. (a) False (b) True
29. 29.🧩 Which component stores a little charge? (a) LDR (b) transistor (c) potentiometer (d) capacitor
30. 30.What does a capacitor do? (a) senses how hot it is (b) limits the current (c) smooths a wobbly supply (d) makes a beeping sound
31. 31.True or false: a resistor stores a little charge. (a) False (b) True
32. 32.True or false: a buzzer beeps for an alarm. (a) False (b) True
33. 33.True or false: a buzzer makes a beeping sound. (a) True (b) False
34. 34.🧩 Which component has coloured bands? (a) fuse (b) thermistor (c) capacitor (d) resistor
35. 35.🧩 Which component limits the current? (a) motor (b) resistor (c) fuse (d) transistor
36. 36.What does a motor do? (a) smooths a wobbly supply (b) is a resistance knob (c) senses how hot it is (d) turns a fan or wheels
37. 37.What does a capacitor do? (a) makes a beeping sound (b) limits the current (c) stores a little charge (d) makes things spin
38. 38.What does a buzzer do? (a) smooths a wobbly supply (b) senses how bright it is (c) makes things spin (d) makes a beeping sound
39. 39.True or false: an LDR senses how bright it is. (a) True (b) False
40. 40.What does a motor do? (a) boosts a small signal (b) makes a beeping sound (c) lets current go one way (d) makes things spin

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids