Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 156 · 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) an LED (c) a motor (d) a fuse
2. 2.🧩 Which component limits the current? (a) fuse (b) transistor (c) capacitor (d) resistor
3. 3.What does a buzzer do? (a) glows using little power (b) senses how bright it is (c) limits the current (d) beeps for an alarm
4. 4.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a capacitor (d) a buzzer
5. 5.What does a diode do? (a) boosts a small signal (b) glows using little power (c) senses how hot it is (d) lets current go one way
6. 6.What does a capacitor do? (a) limits the current (b) stores a little charge (c) has coloured bands (d) makes things spin
7. 7.True or false: a transistor is a resistance knob. (a) False (b) True
8. 8.🧩 A capacitor in a circuit can … (a) store charge briefly (b) spin a wheel (c) measure heat (d) make light
9. 9.🧩 Which component senses how hot it is? (a) thermistor (b) fuse (c) LDR (d) LED
10. 10.True or false: a resistor blows if current is high. (a) False (b) True
11. 11.True or false: a capacitor makes a beeping sound. (a) False (b) True
12. 12.🧩 Which component is a resistance knob? (a) potentiometer (b) fuse (c) thermistor (d) transistor
13. 13.🧩 Which component has coloured bands? (a) fuse (b) resistor (c) diode (d) motor
14. 14.True or false: a capacitor has coloured bands. (a) False (b) True
15. 15.What does a fuse do? (a) blows if current is high (b) beeps for an alarm (c) glows using little power (d) smooths a wobbly supply
16. 16.🧩 Which component boosts a small signal? (a) potentiometer (b) transistor (c) capacitor (d) thermistor
17. 17.True or false: a transistor boosts a small signal. (a) False (b) True
18. 18.🧩 Which component senses how bright it is? (a) potentiometer (b) thermistor (c) diode (d) LDR
19. 19.What does a transistor do? (a) senses how bright it is (b) blows if current is high (c) is a resistance knob (d) boosts a small signal
20. 20.What does a resistor do? (a) limits the current (b) blows if current is high (c) smooths a wobbly supply (d) lets current go one way
21. 21.What does an LDR do? (a) beeps for an alarm (b) senses how bright it is (c) has coloured bands (d) makes things spin
22. 22.What does a resistor do? (a) senses how bright it is (b) stores a little charge (c) turns a fan or wheels (d) has coloured bands
23. 23.What does a potentiometer do? (a) glows using little power (b) smooths a wobbly supply (c) senses how hot it is (d) is a resistance knob
24. 24.🧩 Which component smooths a wobbly supply? (a) transistor (b) potentiometer (c) buzzer (d) capacitor
25. 25.True or false: a diode makes a beeping sound. (a) True (b) False
26. 26.What does a capacitor do? (a) makes things spin (b) beeps for an alarm (c) senses how hot it is (d) smooths a wobbly supply
27. 27.What does a motor do? (a) makes a beeping sound (b) makes things spin (c) is a resistance knob (d) limits the current
28. 28.🧩 Which component beeps for an alarm? (a) buzzer (b) thermistor (c) capacitor (d) transistor
29. 29.🧩 Which component turns a fan or wheels? (a) fuse (b) motor (c) resistor (d) buzzer
30. 30.True or false: a fuse blows if current is high. (a) False (b) True
31. 31.True or false: a resistor has coloured bands. (a) False (b) True
32. 32.🧩 Which component makes a beeping sound? (a) transistor (b) buzzer (c) fuse (d) thermistor
33. 33.🧩 Which component lets current go one way? (a) fuse (b) diode (c) LED (d) transistor
34. 34.True or false: an LDR stores a little charge. (a) False (b) True
35. 35.True or false: a resistor limits the current. (a) False (b) True
36. 36.What does an LED do? (a) glows using little power (b) makes a beeping sound (c) blows if current is high (d) has coloured bands
37. 37.What does a thermistor do? (a) blows if current is high (b) senses how hot it is (c) is a resistance knob (d) senses how bright it is
38. 38.🧩 Which component glows using little power? (a) motor (b) LED (c) fuse (d) transistor
39. 39.True or false: an LED has coloured bands. (a) False (b) True
40. 40.🧩 Which component stores a little charge? (a) capacitor (b) fuse (c) thermistor (d) buzzer

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