Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 487 · 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 fuse (b) an LED (c) a resistor (d) a motor
2. 2.What does a buzzer do? (a) senses how bright it is (b) lets current go one way (c) turns a fan or wheels (d) beeps for an alarm
3. 3.🧩 Which component boosts a small signal? (a) resistor (b) thermistor (c) LED (d) transistor
4. 4.🧩 Which component turns a fan or wheels? (a) LDR (b) motor (c) capacitor (d) resistor
5. 5.True or false: a potentiometer is a resistance knob. (a) True (b) False
6. 6.What does a fuse do? (a) has coloured bands (b) stores a little charge (c) is a resistance knob (d) blows if current is high
7. 7.What does a potentiometer do? (a) turns a fan or wheels (b) is a resistance knob (c) glows using little power (d) senses how hot it is
8. 8.🧩 Which component makes a beeping sound? (a) fuse (b) buzzer (c) transistor (d) resistor
9. 9.🧩 Which component lets current go one way? (a) potentiometer (b) diode (c) thermistor (d) motor
10. 10.🧩 Which component stores a little charge? (a) fuse (b) LDR (c) capacitor (d) motor
11. 11.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) make light (d) store charge briefly
12. 12.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a resistor (d) a diode
13. 13.🧩 Which component is a resistance knob? (a) LED (b) motor (c) potentiometer (d) transistor
14. 14.🧩 Which component has coloured bands? (a) diode (b) resistor (c) buzzer (d) potentiometer
15. 15.What does a thermistor do? (a) glows using little power (b) makes a beeping sound (c) senses how hot it is (d) lets current go one way
16. 16.🧩 Which component smooths a wobbly supply? (a) diode (b) potentiometer (c) resistor (d) capacitor
17. 17.🧩 Which component blows if current is high? (a) resistor (b) capacitor (c) fuse (d) LED
18. 18.What does a resistor do? (a) turns a fan or wheels (b) blows if current is high (c) has coloured bands (d) makes a beeping sound
19. 19.🧩 Which component beeps for an alarm? (a) buzzer (b) fuse (c) LDR (d) motor
20. 20.True or false: an LDR senses how bright it is. (a) False (b) True
21. 21.🧩 Which component limits the current? (a) LDR (b) fuse (c) buzzer (d) resistor
22. 22.What does a capacitor do? (a) boosts a small signal (b) lets current go one way (c) blows if current is high (d) smooths a wobbly supply
23. 23.What does a resistor do? (a) limits the current (b) blows if current is high (c) senses how hot it is (d) senses how bright it is
24. 24.What does a transistor do? (a) glows using little power (b) senses how bright it is (c) lets current go one way (d) boosts a small signal
25. 25.True or false: a fuse blows if current is high. (a) True (b) False
26. 26.True or false: a transistor senses how hot it is. (a) False (b) True
27. 27.True or false: an LDR makes things spin. (a) False (b) True
28. 28.True or false: a potentiometer makes a beeping sound. (a) False (b) True
29. 29.What does a diode do? (a) turns a fan or wheels (b) senses how bright it is (c) lets current go one way (d) makes a beeping sound
30. 30.True or false: a resistor has coloured bands. (a) False (b) True
31. 31.What does a capacitor do? (a) beeps for an alarm (b) stores a little charge (c) makes a beeping sound (d) has coloured bands
32. 32.True or false: a transistor boosts a small signal. (a) True (b) False
33. 33.What does a buzzer do? (a) makes a beeping sound (b) is a resistance knob (c) makes things spin (d) smooths a wobbly supply
34. 34.🧩 Which component senses how bright it is? (a) motor (b) resistor (c) buzzer (d) LDR
35. 35.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
36. 36.True or false: a capacitor stores a little charge. (a) False (b) True
37. 37.🧩 Which component makes things spin? (a) diode (b) transistor (c) LED (d) motor
38. 38.What does an LDR do? (a) makes things spin (b) has coloured bands (c) blows if current is high (d) senses how bright it is
39. 39.True or false: an LDR makes a beeping sound. (a) True (b) False
40. 40.True or false: a resistor boosts a small signal. (a) True (b) False

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