Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 438 · 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.True or false: a fuse blows if current is high. (a) False (b) True
2. 2.🧩 Which component blows if current is high? (a) motor (b) resistor (c) fuse (d) capacitor
3. 3.🧩 Which component has coloured bands? (a) motor (b) fuse (c) LDR (d) resistor
4. 4.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) an LED (d) a motor
5. 5.True or false: a transistor boosts a small signal. (a) True (b) False
6. 6.True or false: a capacitor is a resistance knob. (a) False (b) True
7. 7.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
8. 8.🧩 Which component makes things spin? (a) potentiometer (b) LED (c) motor (d) resistor
9. 9.What does a capacitor do? (a) is a resistance knob (b) limits the current (c) blows if current is high (d) smooths a wobbly supply
10. 10.🧩 Which component is a resistance knob? (a) transistor (b) thermistor (c) resistor (d) potentiometer
11. 11.🧩 Which component stores a little charge? (a) LED (b) capacitor (c) LDR (d) fuse
12. 12.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a capacitor (d) a diode
13. 13.What does a resistor do? (a) senses how bright it is (b) limits the current (c) glows using little power (d) makes a beeping sound
14. 14.What does a buzzer do? (a) blows if current is high (b) stores a little charge (c) beeps for an alarm (d) senses how hot it is
15. 15.True or false: a potentiometer is a resistance knob. (a) True (b) False
16. 16.True or false: a transistor makes things spin. (a) True (b) False
17. 17.True or false: a capacitor limits the current. (a) True (b) False
18. 18.🧩 Which component boosts a small signal? (a) potentiometer (b) resistor (c) transistor (d) LED
19. 19.What does an LDR do? (a) smooths a wobbly supply (b) boosts a small signal (c) limits the current (d) senses how bright it is
20. 20.🧩 Which component limits the current? (a) capacitor (b) diode (c) resistor (d) transistor
21. 21.What does a potentiometer do? (a) is a resistance knob (b) stores a little charge (c) has coloured bands (d) limits the current
22. 22.True or false: a motor senses how bright it is. (a) True (b) False
23. 23.🧩 Which component makes a beeping sound? (a) diode (b) fuse (c) buzzer (d) motor
24. 24.True or false: a thermistor senses how hot it is. (a) False (b) True
25. 25.What does a diode do? (a) smooths a wobbly supply (b) lets current go one way (c) glows using little power (d) makes things spin
26. 26.🧩 Which component beeps for an alarm? (a) buzzer (b) diode (c) LDR (d) thermistor
27. 27.What does a thermistor do? (a) boosts a small signal (b) senses how hot it is (c) makes things spin (d) has coloured bands
28. 28.🧩 Which component lets current go one way? (a) buzzer (b) fuse (c) diode (d) motor
29. 29.What does a motor do? (a) is a resistance knob (b) smooths a wobbly supply (c) limits the current (d) turns a fan or wheels
30. 30.True or false: a resistor lets current go one way. (a) False (b) True
31. 31.True or false: a resistor limits the current. (a) True (b) False
32. 32.🧩 Which component senses how hot it is? (a) buzzer (b) capacitor (c) thermistor (d) transistor
33. 33.True or false: a potentiometer boosts a small signal. (a) False (b) True
34. 34.True or false: an LDR turns a fan or wheels. (a) True (b) False
35. 35.True or false: a diode boosts a small signal. (a) False (b) True
36. 36.True or false: a capacitor has coloured bands. (a) False (b) True
37. 37.True or false: a diode lets current go one way. (a) True (b) False
38. 38.What does a resistor do? (a) is a resistance knob (b) stores a little charge (c) has coloured bands (d) turns a fan or wheels
39. 39.What does a transistor do? (a) boosts a small signal (b) smooths a wobbly supply (c) glows using little power (d) limits the current
40. 40.True or false: a fuse senses how hot it is. (a) True (b) False

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