Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 238 · 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 stores a little charge? (a) capacitor (b) motor (c) resistor (d) LED
2. 2.True or false: a capacitor stores a little charge. (a) True (b) False
3. 3.🧩 Which component glows using little power? (a) fuse (b) potentiometer (c) diode (d) LED
4. 4.🧩 Which part changes electrical energy into sound? (a) a diode (b) a buzzer (c) a capacitor (d) a resistor
5. 5.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
6. 6.True or false: a diode glows using little power. (a) True (b) False
7. 7.🧩 Which component is a resistance knob? (a) resistor (b) motor (c) buzzer (d) potentiometer
8. 8.🧩 Which component senses how hot it is? (a) motor (b) diode (c) thermistor (d) capacitor
9. 9.What does a transistor do? (a) boosts a small signal (b) stores a little charge (c) is a resistance knob (d) makes things spin
10. 10.🧩 Which component blows if current is high? (a) LED (b) thermistor (c) transistor (d) fuse
11. 11.True or false: a thermistor stores a little charge. (a) True (b) False
12. 12.🧩 Which component lets current go one way? (a) LDR (b) diode (c) fuse (d) potentiometer
13. 13.What does a thermistor do? (a) senses how hot it is (b) blows if current is high (c) glows using little power (d) makes a beeping sound
14. 14.What does an LDR do? (a) glows using little power (b) has coloured bands (c) senses how bright it is (d) limits the current
15. 15.What does a buzzer do? (a) blows if current is high (b) beeps for an alarm (c) stores a little charge (d) makes things spin
16. 16.🧩 Which component makes a beeping sound? (a) LED (b) thermistor (c) resistor (d) buzzer
17. 17.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) an LED (d) a fuse
18. 18.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) store charge briefly (d) make light
19. 19.True or false: a resistor has coloured bands. (a) True (b) False
20. 20.What does a resistor do? (a) beeps for an alarm (b) makes a beeping sound (c) has coloured bands (d) senses how bright it is
21. 21.True or false: a capacitor beeps for an alarm. (a) False (b) True
22. 22.True or false: an LDR limits the current. (a) False (b) True
23. 23.What does a potentiometer do? (a) makes a beeping sound (b) is a resistance knob (c) lets current go one way (d) glows using little power
24. 24.True or false: a potentiometer is a resistance knob. (a) False (b) True
25. 25.🧩 Which component has coloured bands? (a) LDR (b) resistor (c) buzzer (d) capacitor
26. 26.True or false: a potentiometer senses how bright it is. (a) True (b) False
27. 27.True or false: a potentiometer senses how hot it is. (a) False (b) True
28. 28.True or false: an LED turns a fan or wheels. (a) True (b) False
29. 29.What does a resistor do? (a) smooths a wobbly supply (b) senses how bright it is (c) limits the current (d) makes a beeping sound
30. 30.What does a diode do? (a) has coloured bands (b) lets current go one way (c) makes a beeping sound (d) blows if current is high
31. 31.True or false: a buzzer stores a little charge. (a) True (b) False
32. 32.True or false: a resistor makes things spin. (a) False (b) True
33. 33.🧩 Which component makes things spin? (a) motor (b) LDR (c) LED (d) capacitor
34. 34.True or false: a buzzer makes a beeping sound. (a) True (b) False
35. 35.🧩 Which component limits the current? (a) LED (b) capacitor (c) resistor (d) buzzer
36. 36.What does an LED do? (a) is a resistance knob (b) blows if current is high (c) glows using little power (d) smooths a wobbly supply
37. 37.True or false: a diode lets current go one way. (a) False (b) True
38. 38.🧩 Which component turns a fan or wheels? (a) fuse (b) diode (c) capacitor (d) motor
39. 39.True or false: a thermistor senses how hot it is. (a) False (b) True
40. 40.What does a fuse do? (a) smooths a wobbly supply (b) senses how hot it is (c) blows if current is high (d) stores a little charge

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