Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 233 · 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 part changes electrical energy into movement? (a) a resistor (b) a motor (c) a fuse (d) an LED
2. 2.True or false: a resistor turns a fan or wheels. (a) True (b) False
3. 3.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a buzzer (d) a capacitor
4. 4.True or false: an LDR limits the current. (a) True (b) False
5. 5.True or false: a motor turns a fan or wheels. (a) False (b) True
6. 6.What does an LED do? (a) turns a fan or wheels (b) glows using little power (c) is a resistance knob (d) lets current go one way
7. 7.True or false: a resistor has coloured bands. (a) False (b) True
8. 8.True or false: a transistor turns a fan or wheels. (a) True (b) False
9. 9.True or false: a capacitor stores a little charge. (a) True (b) False
10. 10.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) store charge briefly (d) spin a wheel
11. 11.🧩 Which component senses how hot it is? (a) capacitor (b) thermistor (c) transistor (d) buzzer
12. 12.True or false: a buzzer makes a beeping sound. (a) True (b) False
13. 13.What does a diode do? (a) blows if current is high (b) glows using little power (c) lets current go one way (d) limits the current
14. 14.True or false: a diode senses how hot it is. (a) False (b) True
15. 15.🧩 Which component senses how bright it is? (a) resistor (b) transistor (c) LDR (d) LED
16. 16.What does a transistor do? (a) glows using little power (b) stores a little charge (c) boosts a small signal (d) beeps for an alarm
17. 17.🧩 Which component has coloured bands? (a) LED (b) resistor (c) motor (d) fuse
18. 18.True or false: a potentiometer is a resistance knob. (a) True (b) False
19. 19.True or false: a thermistor makes things spin. (a) False (b) True
20. 20.What does a fuse do? (a) has coloured bands (b) makes things spin (c) senses how hot it is (d) blows if current is high
21. 21.What does a potentiometer do? (a) turns a fan or wheels (b) makes a beeping sound (c) is a resistance knob (d) smooths a wobbly supply
22. 22.What does a resistor do? (a) stores a little charge (b) has coloured bands (c) blows if current is high (d) senses how bright it is
23. 23.What does a capacitor do? (a) turns a fan or wheels (b) blows if current is high (c) stores a little charge (d) boosts a small signal
24. 24.What does a resistor do? (a) smooths a wobbly supply (b) boosts a small signal (c) limits the current (d) senses how hot it is
25. 25.🧩 Which component limits the current? (a) diode (b) resistor (c) LDR (d) buzzer
26. 26.🧩 Which component turns a fan or wheels? (a) capacitor (b) motor (c) thermistor (d) potentiometer
27. 27.True or false: a buzzer has coloured bands. (a) False (b) True
28. 28.True or false: a resistor limits the current. (a) True (b) False
29. 29.What does a motor do? (a) lets current go one way (b) senses how hot it is (c) makes things spin (d) has coloured bands
30. 30.True or false: a buzzer makes things spin. (a) False (b) True
31. 31.🧩 Which component blows if current is high? (a) buzzer (b) thermistor (c) fuse (d) transistor
32. 32.What does a capacitor do? (a) has coloured bands (b) limits the current (c) smooths a wobbly supply (d) beeps for an alarm
33. 33.🧩 Which component makes things spin? (a) thermistor (b) motor (c) transistor (d) potentiometer
34. 34.What does a motor do? (a) blows if current is high (b) turns a fan or wheels (c) senses how hot it is (d) stores a little charge
35. 35.What does a buzzer do? (a) senses how bright it is (b) limits the current (c) makes a beeping sound (d) makes things spin
36. 36.🧩 Which component stores a little charge? (a) capacitor (b) resistor (c) potentiometer (d) diode
37. 37.🧩 Which component glows using little power? (a) thermistor (b) resistor (c) transistor (d) LED
38. 38.🧩 Which component lets current go one way? (a) motor (b) resistor (c) diode (d) capacitor
39. 39.True or false: a resistor smooths a wobbly supply. (a) True (b) False
40. 40.True or false: a buzzer senses how hot it is. (a) False (b) True

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