Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 408 · 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: an LDR senses how bright it is. (a) False (b) True
2. 2.True or false: a buzzer makes a beeping sound. (a) False (b) True
3. 3.True or false: a motor glows using little power. (a) True (b) False
4. 4.What does a diode do? (a) has coloured bands (b) lets current go one way (c) smooths a wobbly supply (d) stores a little charge
5. 5.What does an LED do? (a) limits the current (b) glows using little power (c) has coloured bands (d) beeps for an alarm
6. 6.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a buzzer (d) a capacitor
7. 7.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) spin a wheel (d) store charge briefly
8. 8.What does an LDR do? (a) senses how hot it is (b) smooths a wobbly supply (c) senses how bright it is (d) is a resistance knob
9. 9.🧩 Which component lets current go one way? (a) capacitor (b) diode (c) resistor (d) motor
10. 10.True or false: an LED smooths a wobbly supply. (a) True (b) False
11. 11.🧩 Which component glows using little power? (a) LED (b) motor (c) transistor (d) potentiometer
12. 12.🧩 Which component is a resistance knob? (a) potentiometer (b) motor (c) capacitor (d) resistor
13. 13.What does a potentiometer do? (a) smooths a wobbly supply (b) is a resistance knob (c) senses how hot it is (d) glows using little power
14. 14.What does a fuse do? (a) beeps for an alarm (b) boosts a small signal (c) blows if current is high (d) lets current go one way
15. 15.What does a transistor do? (a) smooths a wobbly supply (b) boosts a small signal (c) lets current go one way (d) stores a little charge
16. 16.What does a motor do? (a) blows if current is high (b) senses how bright it is (c) limits the current (d) turns a fan or wheels
17. 17.True or false: a thermistor smooths a wobbly supply. (a) True (b) False
18. 18.🧩 Which component makes a beeping sound? (a) resistor (b) buzzer (c) motor (d) fuse
19. 19.What does a buzzer do? (a) beeps for an alarm (b) turns a fan or wheels (c) glows using little power (d) stores a little charge
20. 20.🧩 Which component stores a little charge? (a) fuse (b) capacitor (c) transistor (d) LED
21. 21.🧩 Which component limits the current? (a) motor (b) potentiometer (c) diode (d) resistor
22. 22.🧩 Which component boosts a small signal? (a) diode (b) thermistor (c) LED (d) transistor
23. 23.🧩 Which component beeps for an alarm? (a) LED (b) fuse (c) diode (d) buzzer
24. 24.True or false: a capacitor senses how hot it is. (a) False (b) True
25. 25.🧩 Which component blows if current is high? (a) LDR (b) potentiometer (c) diode (d) fuse
26. 26.What does a thermistor do? (a) makes things spin (b) lets current go one way (c) has coloured bands (d) senses how hot it is
27. 27.What does a capacitor do? (a) has coloured bands (b) boosts a small signal (c) turns a fan or wheels (d) stores a little charge
28. 28.What does a resistor do? (a) limits the current (b) beeps for an alarm (c) glows using little power (d) is a resistance knob
29. 29.🧩 Which component makes things spin? (a) motor (b) transistor (c) LDR (d) potentiometer
30. 30.True or false: a motor turns a fan or wheels. (a) True (b) False
31. 31.True or false: an LED turns a fan or wheels. (a) False (b) True
32. 32.True or false: a resistor limits the current. (a) True (b) False
33. 33.🧩 Which component smooths a wobbly supply? (a) LED (b) fuse (c) capacitor (d) motor
34. 34.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) a resistor (d) an LED
35. 35.True or false: a resistor makes a beeping sound. (a) True (b) False
36. 36.🧩 Which component senses how bright it is? (a) resistor (b) fuse (c) capacitor (d) LDR
37. 37.True or false: a motor senses how bright it is. (a) False (b) True
38. 38.True or false: an LED glows using little power. (a) True (b) False
39. 39.What does a buzzer do? (a) stores a little charge (b) has coloured bands (c) senses how hot it is (d) makes a beeping sound
40. 40.True or false: a transistor stores a little charge. (a) False (b) True

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