Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 601 · 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 transistor do? (a) lets current go one way (b) stores a little charge (c) has coloured bands (d) boosts a small signal
2. 2.What does a resistor do? (a) is a resistance knob (b) makes a beeping sound (c) turns a fan or wheels (d) limits the current
3. 3.🧩 Which component stores a little charge? (a) motor (b) capacitor (c) LDR (d) fuse
4. 4.True or false: a diode lets current go one way. (a) True (b) False
5. 5.🧩 Which component boosts a small signal? (a) LED (b) potentiometer (c) transistor (d) thermistor
6. 6.🧩 Which component blows if current is high? (a) diode (b) fuse (c) motor (d) transistor
7. 7.🧩 Which component makes a beeping sound? (a) buzzer (b) motor (c) transistor (d) capacitor
8. 8.🧩 Which component limits the current? (a) diode (b) transistor (c) motor (d) resistor
9. 9.True or false: an LDR stores a little charge. (a) False (b) True
10. 10.True or false: a capacitor limits the current. (a) True (b) False
11. 11.True or false: a buzzer glows using little power. (a) False (b) True
12. 12.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a fuse (d) a motor
13. 13.What does a buzzer do? (a) makes a beeping sound (b) senses how bright it is (c) senses how hot it is (d) is a resistance knob
14. 14.True or false: an LDR senses how bright it is. (a) True (b) False
15. 15.What does a potentiometer do? (a) is a resistance knob (b) has coloured bands (c) senses how bright it is (d) makes a beeping sound
16. 16.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) measure heat (d) store charge briefly
17. 17.True or false: a resistor limits the current. (a) True (b) False
18. 18.True or false: a potentiometer is a resistance knob. (a) False (b) True
19. 19.What does a thermistor do? (a) is a resistance knob (b) has coloured bands (c) senses how hot it is (d) glows using little power
20. 20.🧩 Which component lets current go one way? (a) fuse (b) motor (c) diode (d) potentiometer
21. 21.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
22. 22.🧩 Which component smooths a wobbly supply? (a) capacitor (b) fuse (c) resistor (d) thermistor
23. 23.What does a fuse do? (a) senses how hot it is (b) is a resistance knob (c) blows if current is high (d) makes a beeping sound
24. 24.What does a motor do? (a) senses how hot it is (b) turns a fan or wheels (c) is a resistance knob (d) limits the current
25. 25.True or false: a resistor makes things spin. (a) True (b) False
26. 26.🧩 Which component turns a fan or wheels? (a) thermistor (b) buzzer (c) fuse (d) motor
27. 27.True or false: a motor blows if current is high. (a) False (b) True
28. 28.What does a diode do? (a) limits the current (b) makes a beeping sound (c) has coloured bands (d) lets current go one way
29. 29.🧩 Which component has coloured bands? (a) motor (b) transistor (c) resistor (d) fuse
30. 30.What does an LED do? (a) lets current go one way (b) glows using little power (c) turns a fan or wheels (d) senses how bright it is
31. 31.True or false: a transistor boosts a small signal. (a) True (b) False
32. 32.True or false: a motor makes a beeping sound. (a) True (b) False
33. 33.What does a buzzer do? (a) boosts a small signal (b) glows using little power (c) beeps for an alarm (d) limits the current
34. 34.🧩 Which component makes things spin? (a) transistor (b) LDR (c) motor (d) thermistor
35. 35.🧩 Which component senses how bright it is? (a) resistor (b) buzzer (c) fuse (d) LDR
36. 36.True or false: a capacitor glows using little power. (a) True (b) False
37. 37.True or false: a resistor has coloured bands. (a) True (b) False
38. 38.What does an LDR do? (a) lets current go one way (b) glows using little power (c) smooths a wobbly supply (d) senses how bright it is
39. 39.🧩 Which component is a resistance knob? (a) transistor (b) LDR (c) potentiometer (d) buzzer
40. 40.True or false: a capacitor blows if current is high. (a) False (b) True

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