Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 398 · 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 glows using little power? (a) LDR (b) diode (c) fuse (d) LED
3. 3.What does a capacitor do? (a) stores a little charge (b) has coloured bands (c) beeps for an alarm (d) makes a beeping sound
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 transistor do? (a) boosts a small signal (b) senses how hot it is (c) senses how bright it is (d) makes things spin
6. 6.True or false: an LED glows using little power. (a) True (b) False
7. 7.True or false: a diode lets current go one way. (a) True (b) False
8. 8.🧩 Which component stores a little charge? (a) LED (b) capacitor (c) thermistor (d) diode
9. 9.🧩 Which component smooths a wobbly supply? (a) resistor (b) potentiometer (c) capacitor (d) buzzer
10. 10.🧩 Which component senses how bright it is? (a) buzzer (b) capacitor (c) fuse (d) LDR
11. 11.🧩 Which component boosts a small signal? (a) transistor (b) LDR (c) buzzer (d) potentiometer
12. 12.What does a thermistor do? (a) has coloured bands (b) makes a beeping sound (c) senses how hot it is (d) smooths a wobbly supply
13. 13.True or false: a buzzer glows using little power. (a) True (b) False
14. 14.What does a potentiometer do? (a) limits the current (b) boosts a small signal (c) is a resistance knob (d) blows if current is high
15. 15.🧩 A capacitor in a circuit can … (a) spin a wheel (b) store charge briefly (c) make light (d) measure heat
16. 16.True or false: a resistor boosts a small signal. (a) True (b) False
17. 17.🧩 Which component turns a fan or wheels? (a) motor (b) capacitor (c) LDR (d) buzzer
18. 18.What does a buzzer do? (a) senses how bright it is (b) smooths a wobbly supply (c) stores a little charge (d) beeps for an alarm
19. 19.What does a capacitor do? (a) senses how bright it is (b) glows using little power (c) smooths a wobbly supply (d) makes a beeping sound
20. 20.🧩 Which component limits the current? (a) diode (b) fuse (c) resistor (d) thermistor
21. 21.What does an LDR do? (a) boosts a small signal (b) smooths a wobbly supply (c) makes things spin (d) senses how bright it is
22. 22.🧩 Which component is a resistance knob? (a) thermistor (b) fuse (c) potentiometer (d) motor
23. 23.What does a diode do? (a) glows using little power (b) smooths a wobbly supply (c) makes things spin (d) lets current go one way
24. 24.What does a fuse do? (a) boosts a small signal (b) turns a fan or wheels (c) has coloured bands (d) blows if current is high
25. 25.What does an LED do? (a) lets current go one way (b) has coloured bands (c) boosts a small signal (d) glows using little power
26. 26.🧩 Which component makes things spin? (a) capacitor (b) motor (c) LDR (d) fuse
27. 27.🧩 Which component has coloured bands? (a) capacitor (b) LDR (c) motor (d) resistor
28. 28.True or false: a diode makes a beeping sound. (a) False (b) True
29. 29.True or false: a capacitor lets current go one way. (a) True (b) False
30. 30.True or false: a buzzer makes things spin. (a) False (b) True
31. 31.What does a resistor do? (a) makes a beeping sound (b) smooths a wobbly supply (c) limits the current (d) senses how bright it is
32. 32.True or false: a resistor blows if current is high. (a) True (b) False
33. 33.True or false: a motor limits the current. (a) False (b) True
34. 34.🧩 Which component senses how hot it is? (a) LED (b) LDR (c) diode (d) thermistor
35. 35.What does a buzzer do? (a) boosts a small signal (b) makes a beeping sound (c) blows if current is high (d) turns a fan or wheels
36. 36.What does a motor do? (a) makes things spin (b) makes a beeping sound (c) beeps for an alarm (d) senses how bright it is
37. 37.True or false: a transistor makes a beeping sound. (a) True (b) False
38. 38.True or false: a resistor has coloured bands. (a) False (b) True
39. 39.True or false: a transistor boosts a small signal. (a) False (b) True
40. 40.🧩 Which component lets current go one way? (a) diode (b) fuse (c) capacitor (d) thermistor

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