Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 79 · 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 makes things spin? (a) resistor (b) capacitor (c) motor (d) diode
2. 2.What does a capacitor do? (a) has coloured bands (b) blows if current is high (c) is a resistance knob (d) smooths a wobbly supply
3. 3.What does an LED do? (a) senses how hot it is (b) blows if current is high (c) glows using little power (d) stores a little charge
4. 4.🧩 Which component turns a fan or wheels? (a) transistor (b) buzzer (c) motor (d) capacitor
5. 5.🧩 Which component glows using little power? (a) resistor (b) diode (c) potentiometer (d) LED
6. 6.What does a buzzer do? (a) has coloured bands (b) beeps for an alarm (c) stores a little charge (d) smooths a wobbly supply
7. 7.True or false: a diode lets current go one way. (a) False (b) True
8. 8.True or false: an LDR senses how bright it is. (a) False (b) True
9. 9.🧩 Which component beeps for an alarm? (a) thermistor (b) motor (c) buzzer (d) capacitor
10. 10.🧩 Which component senses how hot it is? (a) motor (b) diode (c) thermistor (d) capacitor
11. 11.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
12. 12.🧩 Which component makes a beeping sound? (a) motor (b) thermistor (c) potentiometer (d) buzzer
13. 13.What does a potentiometer do? (a) makes things spin (b) is a resistance knob (c) lets current go one way (d) blows if current is high
14. 14.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) measure heat (d) spin a wheel
15. 15.🧩 Which component is a resistance knob? (a) buzzer (b) motor (c) transistor (d) potentiometer
16. 16.What does a fuse do? (a) blows if current is high (b) senses how hot it is (c) is a resistance knob (d) stores a little charge
17. 17.What does a transistor do? (a) smooths a wobbly supply (b) stores a little charge (c) glows using little power (d) boosts a small signal
18. 18.🧩 Which component smooths a wobbly supply? (a) transistor (b) LDR (c) capacitor (d) fuse
19. 19.🧩 Which component senses how bright it is? (a) diode (b) fuse (c) buzzer (d) LDR
20. 20.True or false: an LED smooths a wobbly supply. (a) False (b) True
21. 21.True or false: a resistor makes things spin. (a) False (b) True
22. 22.🧩 Which component boosts a small signal? (a) LED (b) capacitor (c) thermistor (d) transistor
23. 23.What does a thermistor do? (a) smooths a wobbly supply (b) senses how hot it is (c) stores a little charge (d) glows using little power
24. 24.True or false: a resistor has coloured bands. (a) False (b) True
25. 25.What does a diode do? (a) is a resistance knob (b) lets current go one way (c) has coloured bands (d) blows if current is high
26. 26.True or false: a diode smooths a wobbly supply. (a) True (b) False
27. 27.What does a motor do? (a) has coloured bands (b) turns a fan or wheels (c) boosts a small signal (d) lets current go one way
28. 28.True or false: a capacitor stores a little charge. (a) False (b) True
29. 29.True or false: a resistor stores a little charge. (a) True (b) False
30. 30.True or false: a capacitor lets current go one way. (a) False (b) True
31. 31.What does a resistor do? (a) smooths a wobbly supply (b) is a resistance knob (c) has coloured bands (d) beeps for an alarm
32. 32.What does an LDR do? (a) makes things spin (b) makes a beeping sound (c) limits the current (d) senses how bright it is
33. 33.True or false: a potentiometer makes a beeping sound. (a) False (b) True
34. 34.True or false: an LED glows using little power. (a) True (b) False
35. 35.What does a resistor do? (a) limits the current (b) senses how hot it is (c) makes a beeping sound (d) boosts a small signal
36. 36.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
37. 37.🧩 Which component blows if current is high? (a) motor (b) diode (c) resistor (d) fuse
38. 38.What does a transistor do? (a) lets current go one way (b) is a resistance knob (c) senses how hot it is (d) boosts a small signal
39. 39.True or false: a potentiometer makes things spin. (a) False (b) True
40. 40.True or false: a motor smooths a wobbly supply. (a) False (b) True

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