Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 210 · 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 resistor do? (a) stores a little charge (b) beeps for an alarm (c) turns a fan or wheels (d) has coloured bands
2. 2.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) make light (d) spin a wheel
3. 3.🧩 Which component makes a beeping sound? (a) transistor (b) buzzer (c) LED (d) LDR
4. 4.🧩 Which component limits the current? (a) capacitor (b) thermistor (c) resistor (d) buzzer
5. 5.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
6. 6.What does a capacitor do? (a) limits the current (b) makes a beeping sound (c) glows using little power (d) stores a little charge
7. 7.What does a fuse do? (a) limits the current (b) boosts a small signal (c) blows if current is high (d) stores a little charge
8. 8.🧩 Which component senses how bright it is? (a) LDR (b) potentiometer (c) resistor (d) fuse
9. 9.🧩 Which component glows using little power? (a) diode (b) LED (c) thermistor (d) transistor
10. 10.What does a buzzer do? (a) limits the current (b) has coloured bands (c) glows using little power (d) makes a beeping sound
11. 11.What does an LED do? (a) makes a beeping sound (b) limits the current (c) senses how bright it is (d) glows using little power
12. 12.What does a thermistor do? (a) limits the current (b) senses how hot it is (c) glows using little power (d) has coloured bands
13. 13.🧩 Which component boosts a small signal? (a) LDR (b) fuse (c) buzzer (d) transistor
14. 14.What does a motor do? (a) blows if current is high (b) boosts a small signal (c) turns a fan or wheels (d) makes a beeping sound
15. 15.True or false: a resistor limits the current. (a) False (b) True
16. 16.🧩 Which component smooths a wobbly supply? (a) capacitor (b) LED (c) potentiometer (d) diode
17. 17.🧩 Which component is a resistance knob? (a) resistor (b) potentiometer (c) diode (d) thermistor
18. 18.🧩 Which component blows if current is high? (a) thermistor (b) resistor (c) LED (d) fuse
19. 19.🧩 Which component beeps for an alarm? (a) capacitor (b) LED (c) buzzer (d) LDR
20. 20.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a capacitor (d) a resistor
21. 21.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
22. 22.True or false: an LED glows using little power. (a) True (b) False
23. 23.True or false: a thermistor makes a beeping sound. (a) True (b) False
24. 24.What does a diode do? (a) glows using little power (b) turns a fan or wheels (c) is a resistance knob (d) lets current go one way
25. 25.True or false: a transistor boosts a small signal. (a) True (b) False
26. 26.What does a potentiometer do? (a) is a resistance knob (b) limits the current (c) smooths a wobbly supply (d) makes things spin
27. 27.🧩 Which component lets current go one way? (a) LDR (b) resistor (c) potentiometer (d) diode
28. 28.True or false: a diode lets current go one way. (a) False (b) True
29. 29.🧩 Which component has coloured bands? (a) buzzer (b) motor (c) potentiometer (d) resistor
30. 30.True or false: a buzzer beeps for an alarm. (a) True (b) False
31. 31.True or false: a motor turns a fan or wheels. (a) True (b) False
32. 32.True or false: a transistor makes a beeping sound. (a) False (b) True
33. 33.What does an LDR do? (a) limits the current (b) stores a little charge (c) senses how bright it is (d) blows if current is high
34. 34.What does a resistor do? (a) is a resistance knob (b) makes a beeping sound (c) limits the current (d) smooths a wobbly supply
35. 35.🧩 Which component senses how hot it is? (a) motor (b) resistor (c) fuse (d) thermistor
36. 36.True or false: a transistor blows if current is high. (a) False (b) True
37. 37.True or false: a thermistor senses how hot it is. (a) False (b) True
38. 38.What does a transistor do? (a) boosts a small signal (b) has coloured bands (c) lets current go one way (d) is a resistance knob
39. 39.True or false: a potentiometer is a resistance knob. (a) False (b) True
40. 40.True or false: a resistor has coloured bands. (a) False (b) True

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