Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 706 · 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 motor (b) an LED (c) a fuse (d) a resistor
2. 2.True or false: a potentiometer boosts a small signal. (a) True (b) False
3. 3.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a diode (d) a resistor
4. 4.🧩 Which component lets current go one way? (a) transistor (b) buzzer (c) capacitor (d) diode
5. 5.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
6. 6.🧩 Which component has coloured bands? (a) potentiometer (b) transistor (c) LED (d) resistor
7. 7.🧩 Which component smooths a wobbly supply? (a) fuse (b) thermistor (c) capacitor (d) potentiometer
8. 8.True or false: a buzzer makes a beeping sound. (a) True (b) False
9. 9.What does a potentiometer do? (a) senses how hot it is (b) makes things spin (c) is a resistance knob (d) lets current go one way
10. 10.True or false: a motor beeps for an alarm. (a) False (b) True
11. 11.True or false: a diode senses how hot it is. (a) True (b) False
12. 12.What does a capacitor do? (a) limits the current (b) is a resistance knob (c) smooths a wobbly supply (d) boosts a small signal
13. 13.🧩 Which component senses how bright it is? (a) capacitor (b) LDR (c) buzzer (d) motor
14. 14.True or false: a capacitor makes a beeping sound. (a) False (b) True
15. 15.True or false: a resistor stores a little charge. (a) True (b) False
16. 16.What does a motor do? (a) makes things spin (b) limits the current (c) smooths a wobbly supply (d) senses how bright it is
17. 17.What does a thermistor do? (a) is a resistance knob (b) stores a little charge (c) blows if current is high (d) senses how hot it is
18. 18.True or false: a potentiometer senses how hot it is. (a) True (b) False
19. 19.True or false: a fuse blows if current is high. (a) False (b) True
20. 20.True or false: a transistor glows using little power. (a) True (b) False
21. 21.What does a buzzer do? (a) stores a little charge (b) makes a beeping sound (c) limits the current (d) smooths a wobbly supply
22. 22.True or false: a fuse is a resistance knob. (a) False (b) True
23. 23.🧩 Which component senses how hot it is? (a) LED (b) thermistor (c) LDR (d) diode
24. 24.What does a capacitor do? (a) turns a fan or wheels (b) limits the current (c) stores a little charge (d) is a resistance knob
25. 25.True or false: a diode lets current go one way. (a) True (b) False
26. 26.🧩 Which component is a resistance knob? (a) fuse (b) thermistor (c) potentiometer (d) LDR
27. 27.True or false: a motor turns a fan or wheels. (a) False (b) True
28. 28.🧩 Which component makes things spin? (a) thermistor (b) diode (c) motor (d) fuse
29. 29.What does an LDR do? (a) lets current go one way (b) makes a beeping sound (c) senses how bright it is (d) is a resistance knob
30. 30.True or false: a potentiometer limits the current. (a) True (b) False
31. 31.What does a buzzer do? (a) limits the current (b) beeps for an alarm (c) is a resistance knob (d) glows using little power
32. 32.True or false: a capacitor boosts a small signal. (a) False (b) True
33. 33.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
34. 34.🧩 Which component stores a little charge? (a) motor (b) capacitor (c) LDR (d) potentiometer
35. 35.What does a resistor do? (a) stores a little charge (b) blows if current is high (c) senses how hot it is (d) limits the current
36. 36.What does a resistor do? (a) senses how hot it is (b) turns a fan or wheels (c) makes a beeping sound (d) has coloured bands
37. 37.What does a motor do? (a) limits the current (b) lets current go one way (c) senses how hot it is (d) turns a fan or wheels
38. 38.🧩 Which component makes a beeping sound? (a) diode (b) potentiometer (c) buzzer (d) resistor
39. 39.True or false: a transistor boosts a small signal. (a) True (b) False
40. 40.What does a transistor do? (a) is a resistance knob (b) boosts a small signal (c) glows using little power (d) makes a beeping sound

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