Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 331 · 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 glows using little power? (a) LDR (b) buzzer (c) potentiometer (d) LED
2. 2.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) make light (d) store charge briefly
3. 3.True or false: a motor turns a fan or wheels. (a) True (b) False
4. 4.True or false: a motor smooths a wobbly supply. (a) True (b) False
5. 5.True or false: a motor makes things spin. (a) True (b) False
6. 6.What does a resistor do? (a) boosts a small signal (b) limits the current (c) senses how hot it is (d) glows using little power
7. 7.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a capacitor (d) a diode
8. 8.What does an LDR do? (a) turns a fan or wheels (b) is a resistance knob (c) smooths a wobbly supply (d) senses how bright it is
9. 9.🧩 Which component blows if current is high? (a) fuse (b) potentiometer (c) LED (d) LDR
10. 10.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) a fuse (d) an LED
11. 11.🧩 Which component turns a fan or wheels? (a) resistor (b) capacitor (c) buzzer (d) motor
12. 12.🧩 Which component is a resistance knob? (a) thermistor (b) capacitor (c) potentiometer (d) LDR
13. 13.🧩 Which component makes things spin? (a) capacitor (b) thermistor (c) motor (d) resistor
14. 14.What does a thermistor do? (a) lets current go one way (b) boosts a small signal (c) senses how hot it is (d) makes a beeping sound
15. 15.What does a motor do? (a) has coloured bands (b) senses how hot it is (c) makes things spin (d) boosts a small signal
16. 16.What does a diode do? (a) has coloured bands (b) lets current go one way (c) smooths a wobbly supply (d) turns a fan or wheels
17. 17.🧩 Which component lets current go one way? (a) LED (b) LDR (c) buzzer (d) diode
18. 18.True or false: a potentiometer turns a fan or wheels. (a) True (b) False
19. 19.What does a fuse do? (a) is a resistance knob (b) blows if current is high (c) stores a little charge (d) senses how bright it is
20. 20.🧩 Which component makes a beeping sound? (a) diode (b) thermistor (c) motor (d) buzzer
21. 21.True or false: a resistor has coloured bands. (a) False (b) True
22. 22.🧩 Which component senses how hot it is? (a) diode (b) fuse (c) capacitor (d) thermistor
23. 23.What does a motor do? (a) turns a fan or wheels (b) limits the current (c) smooths a wobbly supply (d) stores a little charge
24. 24.🧩 Which component beeps for an alarm? (a) LDR (b) buzzer (c) motor (d) fuse
25. 25.True or false: a capacitor senses how bright it is. (a) False (b) True
26. 26.True or false: an LDR smooths a wobbly supply. (a) True (b) False
27. 27.What does a buzzer do? (a) stores a little charge (b) lets current go one way (c) beeps for an alarm (d) senses how bright it is
28. 28.🧩 Which component senses how bright it is? (a) LDR (b) LED (c) diode (d) motor
29. 29.What does a buzzer do? (a) is a resistance knob (b) makes a beeping sound (c) senses how bright it is (d) has coloured bands
30. 30.True or false: a fuse lets current go one way. (a) True (b) False
31. 31.What does an LED do? (a) beeps for an alarm (b) glows using little power (c) makes a beeping sound (d) makes things spin
32. 32.True or false: a resistor stores a little charge. (a) False (b) True
33. 33.🧩 Which component has coloured bands? (a) potentiometer (b) diode (c) resistor (d) thermistor
34. 34.True or false: a capacitor stores a little charge. (a) True (b) False
35. 35.🧩 Which component smooths a wobbly supply? (a) diode (b) fuse (c) capacitor (d) LDR
36. 36.What does a potentiometer do? (a) beeps for an alarm (b) glows using little power (c) makes a beeping sound (d) is a resistance knob
37. 37.🧩 Which component limits the current? (a) capacitor (b) LED (c) transistor (d) resistor
38. 38.What does a capacitor do? (a) smooths a wobbly supply (b) makes things spin (c) has coloured bands (d) turns a fan or wheels
39. 39.True or false: a diode makes a beeping sound. (a) True (b) False
40. 40.What does a transistor do? (a) senses how hot it is (b) turns a fan or wheels (c) is a resistance knob (d) boosts a small signal

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