Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 335 · 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 part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a diode (d) a buzzer
2. 2.🧩 Which component limits the current? (a) fuse (b) LED (c) resistor (d) LDR
3. 3.What does a diode do? (a) makes a beeping sound (b) lets current go one way (c) blows if current is high (d) beeps for an alarm
4. 4.True or false: a diode makes things spin. (a) True (b) False
5. 5.True or false: an LDR senses how bright it is. (a) False (b) True
6. 6.🧩 Which component stores a little charge? (a) transistor (b) capacitor (c) potentiometer (d) diode
7. 7.🧩 Which component makes things spin? (a) fuse (b) motor (c) potentiometer (d) resistor
8. 8.🧩 Which component senses how hot it is? (a) thermistor (b) motor (c) fuse (d) capacitor
9. 9.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a fuse (c) an LED (d) a motor
10. 10.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
11. 11.🧩 Which component beeps for an alarm? (a) potentiometer (b) diode (c) LED (d) buzzer
12. 12.🧩 Which component is a resistance knob? (a) resistor (b) diode (c) thermistor (d) potentiometer
13. 13.True or false: a thermistor senses how hot it is. (a) False (b) True
14. 14.What does a buzzer do? (a) has coloured bands (b) glows using little power (c) beeps for an alarm (d) is a resistance knob
15. 15.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
16. 16.True or false: a diode smooths a wobbly supply. (a) True (b) False
17. 17.What does a resistor do? (a) has coloured bands (b) smooths a wobbly supply (c) turns a fan or wheels (d) beeps for an alarm
18. 18.🧩 Which component lets current go one way? (a) thermistor (b) diode (c) motor (d) resistor
19. 19.True or false: a resistor limits the current. (a) False (b) True
20. 20.🧩 Which component blows if current is high? (a) potentiometer (b) fuse (c) LED (d) capacitor
21. 21.🧩 Which component has coloured bands? (a) potentiometer (b) thermistor (c) fuse (d) resistor
22. 22.True or false: a potentiometer is a resistance knob. (a) False (b) True
23. 23.What does a potentiometer do? (a) turns a fan or wheels (b) has coloured bands (c) limits the current (d) is a resistance knob
24. 24.What does an LED do? (a) senses how bright it is (b) lets current go one way (c) stores a little charge (d) glows using little power
25. 25.True or false: a buzzer makes a beeping sound. (a) True (b) False
26. 26.True or false: a thermistor turns a fan or wheels. (a) False (b) True
27. 27.🧩 Which component smooths a wobbly supply? (a) buzzer (b) thermistor (c) capacitor (d) motor
28. 28.True or false: a capacitor beeps for an alarm. (a) True (b) False
29. 29.True or false: a fuse has coloured bands. (a) True (b) False
30. 30.What does an LDR do? (a) boosts a small signal (b) senses how bright it is (c) turns a fan or wheels (d) senses how hot it is
31. 31.What does a fuse do? (a) smooths a wobbly supply (b) boosts a small signal (c) blows if current is high (d) turns a fan or wheels
32. 32.What does a capacitor do? (a) boosts a small signal (b) has coloured bands (c) turns a fan or wheels (d) stores a little charge
33. 33.What does a transistor do? (a) glows using little power (b) is a resistance knob (c) turns a fan or wheels (d) boosts a small signal
34. 34.What does a resistor do? (a) lets current go one way (b) turns a fan or wheels (c) makes a beeping sound (d) limits the current
35. 35.🧩 Which component boosts a small signal? (a) LDR (b) transistor (c) potentiometer (d) LED
36. 36.What does a capacitor do? (a) boosts a small signal (b) smooths a wobbly supply (c) senses how bright it is (d) senses how hot it is
37. 37.What does a thermistor do? (a) turns a fan or wheels (b) senses how hot it is (c) limits the current (d) blows if current is high
38. 38.True or false: a transistor is a resistance knob. (a) False (b) True
39. 39.🧩 Which component makes a beeping sound? (a) capacitor (b) LED (c) thermistor (d) buzzer
40. 40.What does a buzzer do? (a) boosts a small signal (b) stores a little charge (c) limits the current (d) makes a beeping sound

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