Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 535 · 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) resistor (b) potentiometer (c) motor (d) buzzer
2. 2.True or false: a motor makes things spin. (a) False (b) True
3. 3.🧩 Which component beeps for an alarm? (a) resistor (b) transistor (c) fuse (d) buzzer
4. 4.What does an LDR do? (a) beeps for an alarm (b) senses how bright it is (c) lets current go one way (d) makes things spin
5. 5.🧩 Which component has coloured bands? (a) resistor (b) diode (c) capacitor (d) LDR
6. 6.True or false: a diode is a resistance knob. (a) False (b) True
7. 7.True or false: a potentiometer blows if current is high. (a) False (b) True
8. 8.🧩 Which component senses how hot it is? (a) capacitor (b) thermistor (c) fuse (d) resistor
9. 9.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a fuse (d) a resistor
10. 10.🧩 Which component glows using little power? (a) diode (b) LED (c) capacitor (d) potentiometer
11. 11.🧩 Which component blows if current is high? (a) fuse (b) resistor (c) motor (d) diode
12. 12.What does a transistor do? (a) has coloured bands (b) senses how hot it is (c) boosts a small signal (d) makes a beeping sound
13. 13.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) make light (d) store charge briefly
14. 14.True or false: a thermistor senses how hot it is. (a) False (b) True
15. 15.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a resistor (d) a buzzer
16. 16.True or false: a fuse blows if current is high. (a) True (b) False
17. 17.True or false: a potentiometer limits the current. (a) True (b) False
18. 18.What does a fuse do? (a) has coloured bands (b) blows if current is high (c) stores a little charge (d) smooths a wobbly supply
19. 19.True or false: a resistor limits the current. (a) True (b) False
20. 20.What does an LED do? (a) smooths a wobbly supply (b) glows using little power (c) is a resistance knob (d) blows if current is high
21. 21.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
22. 22.What does a capacitor do? (a) turns a fan or wheels (b) smooths a wobbly supply (c) senses how hot it is (d) is a resistance knob
23. 23.What does a motor do? (a) smooths a wobbly supply (b) makes things spin (c) makes a beeping sound (d) is a resistance knob
24. 24.🧩 Which component lets current go one way? (a) thermistor (b) capacitor (c) diode (d) potentiometer
25. 25.What does a buzzer do? (a) beeps for an alarm (b) senses how bright it is (c) turns a fan or wheels (d) blows if current is high
26. 26.🧩 Which component smooths a wobbly supply? (a) capacitor (b) fuse (c) motor (d) buzzer
27. 27.What does a thermistor do? (a) has coloured bands (b) senses how bright it is (c) limits the current (d) senses how hot it is
28. 28.True or false: an LDR glows using little power. (a) True (b) False
29. 29.What does a diode do? (a) beeps for an alarm (b) lets current go one way (c) glows using little power (d) has coloured bands
30. 30.What does a resistor do? (a) lets current go one way (b) stores a little charge (c) limits the current (d) makes a beeping sound
31. 31.True or false: a thermistor is a resistance knob. (a) True (b) False
32. 32.🧩 Which component stores a little charge? (a) transistor (b) fuse (c) capacitor (d) resistor
33. 33.🧩 Which component turns a fan or wheels? (a) capacitor (b) motor (c) resistor (d) thermistor
34. 34.What does a potentiometer do? (a) makes things spin (b) is a resistance knob (c) glows using little power (d) senses how bright it is
35. 35.What does a buzzer do? (a) boosts a small signal (b) is a resistance knob (c) makes a beeping sound (d) turns a fan or wheels
36. 36.What does a capacitor do? (a) senses how bright it is (b) has coloured bands (c) blows if current is high (d) stores a little charge
37. 37.True or false: a potentiometer is a resistance knob. (a) True (b) False
38. 38.True or false: a buzzer glows using little power. (a) False (b) True
39. 39.True or false: a potentiometer lets current go one way. (a) True (b) False
40. 40.True or false: a resistor blows if current is high. (a) False (b) True

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