Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 647 · 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 beeps for an alarm? (a) potentiometer (b) LDR (c) diode (d) buzzer
2. 2.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a fuse (d) a resistor
3. 3.True or false: a potentiometer is a resistance knob. (a) True (b) False
4. 4.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a diode (d) a resistor
5. 5.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) store charge briefly (d) measure heat
6. 6.🧩 Which component is a resistance knob? (a) resistor (b) motor (c) potentiometer (d) thermistor
7. 7.True or false: a motor turns a fan or wheels. (a) False (b) True
8. 8.🧩 Which component senses how hot it is? (a) fuse (b) motor (c) thermistor (d) LDR
9. 9.🧩 Which component limits the current? (a) resistor (b) buzzer (c) transistor (d) fuse
10. 10.What does a motor do? (a) beeps for an alarm (b) blows if current is high (c) turns a fan or wheels (d) senses how hot it is
11. 11.True or false: a buzzer has coloured bands. (a) False (b) True
12. 12.🧩 Which component makes a beeping sound? (a) resistor (b) fuse (c) buzzer (d) LED
13. 13.True or false: a resistor limits the current. (a) False (b) True
14. 14.What does a capacitor do? (a) senses how hot it is (b) is a resistance knob (c) has coloured bands (d) stores a little charge
15. 15.🧩 Which component smooths a wobbly supply? (a) fuse (b) transistor (c) thermistor (d) capacitor
16. 16.🧩 Which component lets current go one way? (a) fuse (b) diode (c) resistor (d) potentiometer
17. 17.True or false: an LDR senses how bright it is. (a) False (b) True
18. 18.🧩 Which component stores a little charge? (a) transistor (b) thermistor (c) potentiometer (d) capacitor
19. 19.🧩 Which component senses how bright it is? (a) LED (b) fuse (c) diode (d) LDR
20. 20.🧩 Which component turns a fan or wheels? (a) motor (b) thermistor (c) diode (d) fuse
21. 21.What does a thermistor do? (a) senses how bright it is (b) senses how hot it is (c) glows using little power (d) blows if current is high
22. 22.🧩 Which component glows using little power? (a) diode (b) buzzer (c) LED (d) thermistor
23. 23.🧩 Which component makes things spin? (a) LED (b) motor (c) diode (d) resistor
24. 24.🧩 Which component blows if current is high? (a) resistor (b) fuse (c) thermistor (d) LDR
25. 25.True or false: a potentiometer has coloured bands. (a) True (b) False
26. 26.What does an LDR do? (a) has coloured bands (b) makes things spin (c) limits the current (d) senses how bright it is
27. 27.True or false: a diode lets current go one way. (a) False (b) True
28. 28.What does an LED do? (a) senses how hot it is (b) glows using little power (c) boosts a small signal (d) makes things spin
29. 29.What does a buzzer do? (a) turns a fan or wheels (b) stores a little charge (c) beeps for an alarm (d) senses how bright it is
30. 30.True or false: a resistor lets current go one way. (a) True (b) False
31. 31.True or false: a capacitor stores a little charge. (a) True (b) False
32. 32.True or false: a buzzer makes a beeping sound. (a) False (b) True
33. 33.True or false: a capacitor boosts a small signal. (a) True (b) False
34. 34.True or false: an LDR limits the current. (a) True (b) False
35. 35.True or false: a resistor turns a fan or wheels. (a) False (b) True
36. 36.What does a potentiometer do? (a) senses how hot it is (b) turns a fan or wheels (c) is a resistance knob (d) has coloured bands
37. 37.True or false: a capacitor limits the current. (a) False (b) True
38. 38.True or false: a buzzer limits the current. (a) True (b) False
39. 39.What does a fuse do? (a) has coloured bands (b) smooths a wobbly supply (c) senses how bright it is (d) blows if current is high
40. 40.What does a transistor do? (a) makes a beeping sound (b) boosts a small signal (c) limits the current (d) senses how bright it is

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