Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 202 · 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) senses how hot it is (b) blows if current is high (c) stores a little charge (d) limits the current
2. 2.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) measure heat (d) spin a wheel
3. 3.🧩 Which component glows using little power? (a) LDR (b) motor (c) buzzer (d) LED
4. 4.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
5. 5.🧩 Which component limits the current? (a) transistor (b) potentiometer (c) fuse (d) resistor
6. 6.What does a transistor do? (a) is a resistance knob (b) glows using little power (c) boosts a small signal (d) turns a fan or wheels
7. 7.True or false: a diode lets current go one way. (a) True (b) False
8. 8.True or false: a buzzer limits the current. (a) True (b) False
9. 9.What does a fuse do? (a) boosts a small signal (b) stores a little charge (c) limits the current (d) blows if current is high
10. 10.True or false: a fuse has coloured bands. (a) False (b) True
11. 11.🧩 Which component beeps for an alarm? (a) motor (b) resistor (c) buzzer (d) thermistor
12. 12.What does an LED do? (a) turns a fan or wheels (b) glows using little power (c) senses how bright it is (d) senses how hot it is
13. 13.🧩 Which component smooths a wobbly supply? (a) LDR (b) capacitor (c) resistor (d) potentiometer
14. 14.True or false: an LED glows using little power. (a) True (b) False
15. 15.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
16. 16.What does a resistor do? (a) has coloured bands (b) glows using little power (c) stores a little charge (d) boosts a small signal
17. 17.True or false: a resistor glows using little power. (a) False (b) True
18. 18.True or false: a motor turns a fan or wheels. (a) False (b) True
19. 19.What does a buzzer do? (a) makes things spin (b) smooths a wobbly supply (c) limits the current (d) beeps for an alarm
20. 20.🧩 Which component blows if current is high? (a) potentiometer (b) LDR (c) capacitor (d) fuse
21. 21.🧩 Which component boosts a small signal? (a) LDR (b) motor (c) transistor (d) potentiometer
22. 22.🧩 Which component stores a little charge? (a) capacitor (b) potentiometer (c) resistor (d) diode
23. 23.🧩 Which component lets current go one way? (a) diode (b) transistor (c) motor (d) LED
24. 24.What does a capacitor do? (a) glows using little power (b) senses how hot it is (c) is a resistance knob (d) stores a little charge
25. 25.What does a capacitor do? (a) senses how hot it is (b) smooths a wobbly supply (c) senses how bright it is (d) is a resistance knob
26. 26.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a diode (d) a resistor
27. 27.🧩 Which component is a resistance knob? (a) motor (b) resistor (c) potentiometer (d) diode
28. 28.What does a motor do? (a) glows using little power (b) turns a fan or wheels (c) has coloured bands (d) limits the current
29. 29.What does a motor do? (a) senses how bright it is (b) stores a little charge (c) lets current go one way (d) makes things spin
30. 30.What does a potentiometer do? (a) limits the current (b) is a resistance knob (c) makes things spin (d) beeps for an alarm
31. 31.True or false: an LDR is a resistance knob. (a) True (b) False
32. 32.True or false: a resistor has coloured bands. (a) False (b) True
33. 33.True or false: an LDR senses how bright it is. (a) True (b) False
34. 34.What does an LDR do? (a) beeps for an alarm (b) has coloured bands (c) stores a little charge (d) senses how bright it is
35. 35.🧩 Which component senses how hot it is? (a) buzzer (b) thermistor (c) transistor (d) capacitor
36. 36.True or false: a potentiometer senses how bright it is. (a) False (b) True
37. 37.🧩 Which component turns a fan or wheels? (a) potentiometer (b) thermistor (c) motor (d) buzzer
38. 38.True or false: a fuse blows if current is high. (a) False (b) True
39. 39.What does a buzzer do? (a) turns a fan or wheels (b) makes a beeping sound (c) senses how hot it is (d) stores a little charge
40. 40.True or false: a diode has coloured bands. (a) True (b) False

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