Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 461 · 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 thermistor do? (a) has coloured bands (b) smooths a wobbly supply (c) senses how hot it is (d) limits the current
2. 2.True or false: a diode has coloured bands. (a) True (b) False
3. 3.What does a fuse do? (a) senses how bright it is (b) blows if current is high (c) beeps for an alarm (d) makes a beeping sound
4. 4.True or false: an LED has coloured bands. (a) False (b) True
5. 5.What does a resistor do? (a) makes things spin (b) senses how hot it is (c) stores a little charge (d) has coloured bands
6. 6.🧩 Which component senses how hot it is? (a) thermistor (b) capacitor (c) LDR (d) potentiometer
7. 7.What does a resistor do? (a) senses how hot it is (b) makes a beeping sound (c) limits the current (d) beeps for an alarm
8. 8.🧩 Which component stores a little charge? (a) motor (b) capacitor (c) buzzer (d) potentiometer
9. 9.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
10. 10.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) store charge briefly (d) spin a wheel
11. 11.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a resistor (c) a motor (d) an LED
12. 12.True or false: a potentiometer is a resistance knob. (a) True (b) False
13. 13.🧩 Which component turns a fan or wheels? (a) diode (b) motor (c) transistor (d) thermistor
14. 14.What does a motor do? (a) is a resistance knob (b) glows using little power (c) stores a little charge (d) makes things spin
15. 15.🧩 Which component lets current go one way? (a) motor (b) diode (c) capacitor (d) potentiometer
16. 16.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a diode (d) a resistor
17. 17.🧩 Which component smooths a wobbly supply? (a) LED (b) fuse (c) capacitor (d) potentiometer
18. 18.True or false: a fuse is a resistance knob. (a) False (b) True
19. 19.True or false: a motor turns a fan or wheels. (a) False (b) True
20. 20.What does a diode do? (a) limits the current (b) beeps for an alarm (c) senses how bright it is (d) lets current go one way
21. 21.🧩 Which component limits the current? (a) LED (b) resistor (c) motor (d) buzzer
22. 22.🧩 Which component beeps for an alarm? (a) transistor (b) buzzer (c) fuse (d) LDR
23. 23.What does a capacitor do? (a) makes a beeping sound (b) senses how bright it is (c) stores a little charge (d) makes things spin
24. 24.🧩 Which component makes a beeping sound? (a) motor (b) LDR (c) resistor (d) buzzer
25. 25.True or false: a buzzer glows using little power. (a) False (b) True
26. 26.🧩 Which component makes things spin? (a) motor (b) capacitor (c) fuse (d) transistor
27. 27.🧩 Which component blows if current is high? (a) capacitor (b) LDR (c) potentiometer (d) fuse
28. 28.What does a capacitor do? (a) smooths a wobbly supply (b) glows using little power (c) lets current go one way (d) beeps for an alarm
29. 29.What does a buzzer do? (a) beeps for an alarm (b) lets current go one way (c) is a resistance knob (d) smooths a wobbly supply
30. 30.What does an LDR do? (a) smooths a wobbly supply (b) lets current go one way (c) senses how bright it is (d) stores a little charge
31. 31.True or false: a capacitor boosts a small signal. (a) False (b) True
32. 32.🧩 Which component is a resistance knob? (a) capacitor (b) resistor (c) thermistor (d) potentiometer
33. 33.True or false: a fuse limits the current. (a) True (b) False
34. 34.True or false: a transistor limits the current. (a) True (b) False
35. 35.True or false: a diode stores a little charge. (a) True (b) False
36. 36.What does an LED do? (a) makes a beeping sound (b) blows if current is high (c) makes things spin (d) glows using little power
37. 37.True or false: a buzzer has coloured bands. (a) False (b) True
38. 38.🧩 Which component glows using little power? (a) LED (b) transistor (c) motor (d) buzzer
39. 39.True or false: a capacitor lets current go one way. (a) False (b) True
40. 40.True or false: a transistor senses how bright it is. (a) True (b) False

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