Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 362 · 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 component limits the current? (a) thermistor (b) LED (c) resistor (d) diode
2. 2.What does a thermistor do? (a) beeps for an alarm (b) glows using little power (c) smooths a wobbly supply (d) senses how hot it is
3. 3.True or false: a resistor limits the current. (a) False (b) True
4. 4.What does a potentiometer do? (a) is a resistance knob (b) boosts a small signal (c) limits the current (d) senses how bright it is
5. 5.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
6. 6.What does a diode do? (a) smooths a wobbly supply (b) glows using little power (c) boosts a small signal (d) lets current go one way
7. 7.True or false: a motor makes things spin. (a) True (b) False
8. 8.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) spin a wheel (d) measure heat
9. 9.What does an LED do? (a) makes things spin (b) stores a little charge (c) lets current go one way (d) glows using little power
10. 10.True or false: an LDR boosts a small signal. (a) True (b) False
11. 11.What does a resistor do? (a) glows using little power (b) boosts a small signal (c) makes a beeping sound (d) limits the current
12. 12.True or false: a motor turns a fan or wheels. (a) False (b) True
13. 13.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) an LED (d) a resistor
14. 14.True or false: a diode lets current go one way. (a) False (b) True
15. 15.True or false: a transistor boosts a small signal. (a) True (b) False
16. 16.True or false: a potentiometer makes a beeping sound. (a) True (b) False
17. 17.True or false: a diode beeps for an alarm. (a) False (b) True
18. 18.🧩 Which component has coloured bands? (a) resistor (b) thermistor (c) buzzer (d) LED
19. 19.What does a buzzer do? (a) beeps for an alarm (b) glows using little power (c) turns a fan or wheels (d) senses how hot it is
20. 20.🧩 Which component lets current go one way? (a) capacitor (b) motor (c) diode (d) transistor
21. 21.🧩 Which component senses how hot it is? (a) diode (b) thermistor (c) LDR (d) LED
22. 22.True or false: a fuse blows if current is high. (a) False (b) True
23. 23.🧩 Which component blows if current is high? (a) resistor (b) fuse (c) thermistor (d) buzzer
24. 24.What does a resistor do? (a) beeps for an alarm (b) makes a beeping sound (c) senses how bright it is (d) has coloured bands
25. 25.🧩 Which component beeps for an alarm? (a) capacitor (b) buzzer (c) transistor (d) motor
26. 26.🧩 Which component smooths a wobbly supply? (a) buzzer (b) capacitor (c) resistor (d) thermistor
27. 27.What does a transistor do? (a) senses how hot it is (b) lets current go one way (c) limits the current (d) boosts a small signal
28. 28.What does a capacitor do? (a) is a resistance knob (b) limits the current (c) blows if current is high (d) smooths a wobbly supply
29. 29.What does a capacitor do? (a) stores a little charge (b) glows using little power (c) is a resistance knob (d) makes a beeping sound
30. 30.True or false: a potentiometer senses how hot it is. (a) True (b) False
31. 31.🧩 Which component stores a little charge? (a) capacitor (b) resistor (c) LED (d) thermistor
32. 32.What does a motor do? (a) glows using little power (b) smooths a wobbly supply (c) turns a fan or wheels (d) is a resistance knob
33. 33.True or false: a resistor makes things spin. (a) False (b) True
34. 34.True or false: an LED lets current go one way. (a) True (b) False
35. 35.What does a fuse do? (a) boosts a small signal (b) senses how hot it is (c) senses how bright it is (d) blows if current is high
36. 36.🧩 Which component is a resistance knob? (a) potentiometer (b) LDR (c) transistor (d) thermistor
37. 37.True or false: a thermistor lets current go one way. (a) True (b) False
38. 38.🧩 Which component boosts a small signal? (a) motor (b) resistor (c) potentiometer (d) transistor
39. 39.🧩 Which component turns a fan or wheels? (a) motor (b) LED (c) thermistor (d) capacitor
40. 40.🧩 Which component makes things spin? (a) capacitor (b) transistor (c) motor (d) fuse

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