Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 499 · 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.What does a capacitor do? (a) makes things spin (b) stores a little charge (c) has coloured bands (d) limits the current
2. 2.What does a motor do? (a) beeps for an alarm (b) glows using little power (c) stores a little charge (d) turns a fan or wheels
3. 3.True or false: a buzzer stores a little charge. (a) False (b) True
4. 4.🧩 Which component limits the current? (a) LDR (b) capacitor (c) fuse (d) resistor
5. 5.🧩 Which component glows using little power? (a) LED (b) thermistor (c) LDR (d) motor
6. 6.What does a motor do? (a) beeps for an alarm (b) makes things spin (c) senses how hot it is (d) limits the current
7. 7.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a motor (d) a fuse
8. 8.True or false: a diode limits the current. (a) False (b) True
9. 9.What does a transistor do? (a) has coloured bands (b) lets current go one way (c) boosts a small signal (d) smooths a wobbly supply
10. 10.🧩 Which component turns a fan or wheels? (a) resistor (b) transistor (c) motor (d) diode
11. 11.🧩 A capacitor in a circuit can … (a) store charge briefly (b) spin a wheel (c) measure heat (d) make light
12. 12.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a buzzer (d) a capacitor
13. 13.True or false: a fuse senses how bright it is. (a) False (b) True
14. 14.🧩 Which component has coloured bands? (a) capacitor (b) motor (c) resistor (d) transistor
15. 15.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
16. 16.🧩 Which component stores a little charge? (a) capacitor (b) transistor (c) buzzer (d) resistor
17. 17.What does a thermistor do? (a) senses how hot it is (b) senses how bright it is (c) turns a fan or wheels (d) has coloured bands
18. 18.🧩 Which component smooths a wobbly supply? (a) motor (b) resistor (c) potentiometer (d) capacitor
19. 19.True or false: a motor makes things spin. (a) True (b) False
20. 20.🧩 Which component senses how bright it is? (a) diode (b) thermistor (c) LED (d) LDR
21. 21.🧩 Which component blows if current is high? (a) potentiometer (b) buzzer (c) resistor (d) fuse
22. 22.True or false: a resistor stores a little charge. (a) False (b) True
23. 23.🧩 Which component makes a beeping sound? (a) capacitor (b) thermistor (c) resistor (d) buzzer
24. 24.What does a potentiometer do? (a) senses how hot it is (b) has coloured bands (c) is a resistance knob (d) blows if current is high
25. 25.What does a resistor do? (a) lets current go one way (b) is a resistance knob (c) makes things spin (d) limits the current
26. 26.🧩 Which component is a resistance knob? (a) potentiometer (b) diode (c) resistor (d) motor
27. 27.True or false: a resistor is a resistance knob. (a) False (b) True
28. 28.What does a diode do? (a) smooths a wobbly supply (b) turns a fan or wheels (c) limits the current (d) lets current go one way
29. 29.True or false: a diode lets current go one way. (a) True (b) False
30. 30.What does an LED do? (a) has coloured bands (b) boosts a small signal (c) is a resistance knob (d) glows using little power
31. 31.🧩 Which component beeps for an alarm? (a) resistor (b) buzzer (c) capacitor (d) potentiometer
32. 32.True or false: a motor turns a fan or wheels. (a) False (b) True
33. 33.🧩 Which component makes things spin? (a) buzzer (b) motor (c) LED (d) diode
34. 34.🧩 Which component lets current go one way? (a) resistor (b) thermistor (c) buzzer (d) diode
35. 35.🧩 Which component boosts a small signal? (a) resistor (b) fuse (c) transistor (d) capacitor
36. 36.What does a buzzer do? (a) stores a little charge (b) limits the current (c) makes a beeping sound (d) glows using little power
37. 37.True or false: a buzzer beeps for an alarm. (a) True (b) False
38. 38.What does a capacitor do? (a) is a resistance knob (b) lets current go one way (c) smooths a wobbly supply (d) turns a fan or wheels
39. 39.What does a fuse do? (a) blows if current is high (b) stores a little charge (c) turns a fan or wheels (d) makes a beeping sound
40. 40.What does a buzzer do? (a) makes things spin (b) has coloured bands (c) beeps for an alarm (d) smooths a wobbly supply

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