Electronics Worksheet: Electronic Components

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

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