Electronics Worksheet: Electronic Components

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

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