Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 195 · 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 buzzer blows if current is high. (a) True (b) False
2. 2.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a buzzer (d) a capacitor
3. 3.🧩 Which component turns a fan or wheels? (a) capacitor (b) LDR (c) motor (d) thermistor
4. 4.What does a buzzer do? (a) stores a little charge (b) beeps for an alarm (c) has coloured bands (d) senses how hot it is
5. 5.🧩 Which component beeps for an alarm? (a) potentiometer (b) LDR (c) resistor (d) buzzer
6. 6.What does a diode do? (a) beeps for an alarm (b) turns a fan or wheels (c) lets current go one way (d) senses how bright it is
7. 7.What does a buzzer do? (a) blows if current is high (b) smooths a wobbly supply (c) makes a beeping sound (d) has coloured bands
8. 8.🧩 Which component is a resistance knob? (a) resistor (b) thermistor (c) potentiometer (d) diode
9. 9.True or false: a diode lets current go one way. (a) False (b) True
10. 10.🧩 Which component smooths a wobbly supply? (a) LDR (b) LED (c) buzzer (d) capacitor
11. 11.🧩 Which component senses how bright it is? (a) LED (b) LDR (c) capacitor (d) motor
12. 12.True or false: a thermistor smooths a wobbly supply. (a) True (b) False
13. 13.What does a potentiometer do? (a) smooths a wobbly supply (b) makes things spin (c) is a resistance knob (d) senses how bright it is
14. 14.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a fuse (d) a resistor
15. 15.True or false: a potentiometer senses how bright it is. (a) False (b) True
16. 16.True or false: an LDR senses how bright it is. (a) True (b) False
17. 17.🧩 Which component lets current go one way? (a) resistor (b) motor (c) potentiometer (d) diode
18. 18.What does a capacitor do? (a) has coloured bands (b) smooths a wobbly supply (c) senses how bright it is (d) boosts a small signal
19. 19.What does a transistor do? (a) turns a fan or wheels (b) is a resistance knob (c) boosts a small signal (d) smooths a wobbly supply
20. 20.True or false: a motor glows using little power. (a) True (b) False
21. 21.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
22. 22.True or false: an LDR limits the current. (a) True (b) False
23. 23.What does a capacitor do? (a) limits the current (b) stores a little charge (c) turns a fan or wheels (d) boosts a small signal
24. 24.What does a thermistor do? (a) boosts a small signal (b) turns a fan or wheels (c) makes a beeping sound (d) senses how hot it is
25. 25.True or false: a motor makes things spin. (a) True (b) False
26. 26.🧩 Which component boosts a small signal? (a) capacitor (b) transistor (c) buzzer (d) resistor
27. 27.True or false: a capacitor is a resistance knob. (a) True (b) False
28. 28.What does a motor do? (a) blows if current is high (b) turns a fan or wheels (c) beeps for an alarm (d) is a resistance knob
29. 29.True or false: a fuse blows if current is high. (a) False (b) True
30. 30.True or false: a diode limits the current. (a) False (b) True
31. 31.What does an LED do? (a) beeps for an alarm (b) senses how bright it is (c) makes things spin (d) glows using little power
32. 32.True or false: a thermistor makes things spin. (a) False (b) True
33. 33.True or false: a capacitor stores a little charge. (a) False (b) True
34. 34.True or false: a buzzer beeps for an alarm. (a) True (b) False
35. 35.What does an LDR do? (a) turns a fan or wheels (b) stores a little charge (c) smooths a wobbly supply (d) senses how bright it is
36. 36.🧩 Which component makes things spin? (a) motor (b) potentiometer (c) resistor (d) transistor
37. 37.🧩 Which component stores a little charge? (a) diode (b) resistor (c) thermistor (d) capacitor
38. 38.True or false: a resistor has coloured bands. (a) True (b) False
39. 39.🧩 Which component senses how hot it is? (a) thermistor (b) diode (c) capacitor (d) fuse
40. 40.What does a resistor do? (a) makes a beeping sound (b) beeps for an alarm (c) lets current go one way (d) limits the current

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