Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 117 · 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 capacitor blows if current is high. (a) True (b) False
2. 2.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
3. 3.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a capacitor (d) a buzzer
4. 4.True or false: a capacitor stores a little charge. (a) False (b) True
5. 5.True or false: a buzzer makes a beeping sound. (a) False (b) True
6. 6.True or false: a resistor turns a fan or wheels. (a) False (b) True
7. 7.🧩 Which component beeps for an alarm? (a) buzzer (b) potentiometer (c) resistor (d) LDR
8. 8.What does a motor do? (a) makes things spin (b) lets current go one way (c) is a resistance knob (d) senses how hot it is
9. 9.🧩 Which component smooths a wobbly supply? (a) motor (b) buzzer (c) capacitor (d) potentiometer
10. 10.🧩 Which component stores a little charge? (a) transistor (b) potentiometer (c) capacitor (d) fuse
11. 11.What does a capacitor do? (a) stores a little charge (b) turns a fan or wheels (c) lets current go one way (d) has coloured bands
12. 12.What does a potentiometer do? (a) boosts a small signal (b) is a resistance knob (c) senses how hot it is (d) glows using little power
13. 13.🧩 Which component senses how bright it is? (a) thermistor (b) resistor (c) LED (d) LDR
14. 14.What does a buzzer do? (a) makes a beeping sound (b) boosts a small signal (c) blows if current is high (d) limits the current
15. 15.🧩 Which component is a resistance knob? (a) capacitor (b) motor (c) potentiometer (d) fuse
16. 16.🧩 Which component lets current go one way? (a) potentiometer (b) resistor (c) buzzer (d) diode
17. 17.True or false: a transistor boosts a small signal. (a) False (b) True
18. 18.True or false: an LDR senses how bright it is. (a) True (b) False
19. 19.True or false: an LED is a resistance knob. (a) False (b) True
20. 20.True or false: a diode lets current go one way. (a) True (b) False
21. 21.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) an LED (d) a resistor
22. 22.🧩 Which component makes things spin? (a) fuse (b) resistor (c) buzzer (d) motor
23. 23.What does a transistor do? (a) blows if current is high (b) has coloured bands (c) boosts a small signal (d) turns a fan or wheels
24. 24.True or false: a motor blows if current is high. (a) False (b) True
25. 25.🧩 Which component boosts a small signal? (a) transistor (b) capacitor (c) diode (d) resistor
26. 26.What does a thermistor do? (a) turns a fan or wheels (b) stores a little charge (c) limits the current (d) senses how hot it is
27. 27.🧩 Which component limits the current? (a) LED (b) potentiometer (c) resistor (d) fuse
28. 28.True or false: an LED glows using little power. (a) True (b) False
29. 29.What does an LDR do? (a) smooths a wobbly supply (b) boosts a small signal (c) stores a little charge (d) senses how bright it is
30. 30.What does a buzzer do? (a) makes things spin (b) limits the current (c) beeps for an alarm (d) stores a little charge
31. 31.🧩 Which component has coloured bands? (a) resistor (b) transistor (c) LDR (d) potentiometer
32. 32.True or false: a thermistor limits the current. (a) False (b) True
33. 33.True or false: a buzzer smooths a wobbly supply. (a) False (b) True
34. 34.🧩 Which component turns a fan or wheels? (a) capacitor (b) motor (c) resistor (d) thermistor
35. 35.True or false: a buzzer glows using little power. (a) False (b) True
36. 36.What does a fuse do? (a) glows using little power (b) blows if current is high (c) senses how hot it is (d) makes things spin
37. 37.🧩 Which component senses how hot it is? (a) thermistor (b) fuse (c) LED (d) motor
38. 38.🧩 Which component blows if current is high? (a) LED (b) capacitor (c) diode (d) fuse
39. 39.True or false: a motor lets current go one way. (a) True (b) False
40. 40.True or false: a resistor turns a fan or wheels. (a) True (b) False

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