Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 428 · 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.What does a potentiometer do? (a) senses how hot it is (b) stores a little charge (c) is a resistance knob (d) turns a fan or wheels
2. 2.True or false: a transistor has coloured bands. (a) True (b) False
3. 3.🧩 Which component smooths a wobbly supply? (a) capacitor (b) buzzer (c) transistor (d) resistor
4. 4.🧩 Which component makes things spin? (a) LDR (b) motor (c) capacitor (d) resistor
5. 5.What does a buzzer do? (a) has coloured bands (b) turns a fan or wheels (c) is a resistance knob (d) makes a beeping sound
6. 6.🧩 Which component glows using little power? (a) fuse (b) LED (c) buzzer (d) thermistor
7. 7.🧩 Which component beeps for an alarm? (a) LDR (b) LED (c) buzzer (d) fuse
8. 8.What does a thermistor do? (a) senses how hot it is (b) beeps for an alarm (c) makes a beeping sound (d) has coloured bands
9. 9.What does an LDR do? (a) makes things spin (b) stores a little charge (c) limits the current (d) senses how bright it is
10. 10.True or false: an LDR lets current go one way. (a) True (b) False
11. 11.True or false: a potentiometer is a resistance knob. (a) False (b) True
12. 12.What does a resistor do? (a) boosts a small signal (b) has coloured bands (c) lets current go one way (d) glows using little power
13. 13.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) make light (d) spin a wheel
14. 14.🧩 Which component limits the current? (a) motor (b) capacitor (c) resistor (d) potentiometer
15. 15.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a buzzer (d) a capacitor
16. 16.What does a resistor do? (a) glows using little power (b) blows if current is high (c) limits the current (d) makes things spin
17. 17.True or false: a capacitor stores a little charge. (a) False (b) True
18. 18.True or false: a resistor limits the current. (a) True (b) False
19. 19.What does a buzzer do? (a) lets current go one way (b) beeps for an alarm (c) limits the current (d) has coloured bands
20. 20.🧩 Which component stores a little charge? (a) capacitor (b) potentiometer (c) resistor (d) LED
21. 21.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) an LED (d) a resistor
22. 22.🧩 Which component has coloured bands? (a) diode (b) resistor (c) capacitor (d) potentiometer
23. 23.True or false: a fuse blows if current is high. (a) True (b) False
24. 24.🧩 Which component turns a fan or wheels? (a) diode (b) motor (c) potentiometer (d) resistor
25. 25.What does a capacitor do? (a) blows if current is high (b) smooths a wobbly supply (c) senses how hot it is (d) makes things spin
26. 26.🧩 Which component senses how hot it is? (a) thermistor (b) resistor (c) capacitor (d) potentiometer
27. 27.True or false: an LDR smooths a wobbly supply. (a) False (b) True
28. 28.What does an LED do? (a) is a resistance knob (b) glows using little power (c) limits the current (d) turns a fan or wheels
29. 29.True or false: a potentiometer boosts a small signal. (a) False (b) True
30. 30.True or false: a resistor has coloured bands. (a) False (b) True
31. 31.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
32. 32.True or false: a transistor boosts a small signal. (a) False (b) True
33. 33.What does a transistor do? (a) smooths a wobbly supply (b) turns a fan or wheels (c) boosts a small signal (d) senses how bright it is
34. 34.🧩 Which component lets current go one way? (a) diode (b) potentiometer (c) transistor (d) LDR
35. 35.What does a motor do? (a) turns a fan or wheels (b) glows using little power (c) has coloured bands (d) boosts a small signal
36. 36.🧩 Which component boosts a small signal? (a) resistor (b) LED (c) LDR (d) transistor
37. 37.True or false: a potentiometer smooths a wobbly supply. (a) True (b) False
38. 38.True or false: a motor turns a fan or wheels. (a) False (b) True
39. 39.🧩 Which component blows if current is high? (a) motor (b) thermistor (c) fuse (d) capacitor
40. 40.What does a fuse do? (a) boosts a small signal (b) blows if current is high (c) turns a fan or wheels (d) limits the current

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