Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 427 · 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 senses how bright it is? (a) resistor (b) LDR (c) capacitor (d) transistor
2. 2.What does an LED do? (a) senses how hot it is (b) is a resistance knob (c) glows using little power (d) makes a beeping sound
3. 3.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a diode (d) a resistor
4. 4.🧩 Which component smooths a wobbly supply? (a) LDR (b) resistor (c) transistor (d) capacitor
5. 5.🧩 Which component stores a little charge? (a) motor (b) transistor (c) capacitor (d) buzzer
6. 6.🧩 Which component makes things spin? (a) transistor (b) LED (c) potentiometer (d) motor
7. 7.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) spin a wheel (d) measure heat
8. 8.True or false: a fuse blows if current is high. (a) True (b) False
9. 9.🧩 Which component makes a beeping sound? (a) buzzer (b) resistor (c) motor (d) potentiometer
10. 10.What does a potentiometer do? (a) beeps for an alarm (b) lets current go one way (c) limits the current (d) is a resistance knob
11. 11.True or false: a fuse stores a little charge. (a) True (b) False
12. 12.🧩 Which component lets current go one way? (a) LDR (b) diode (c) fuse (d) LED
13. 13.What does an LDR do? (a) smooths a wobbly supply (b) lets current go one way (c) blows if current is high (d) senses how bright it is
14. 14.🧩 Which component turns a fan or wheels? (a) motor (b) transistor (c) buzzer (d) capacitor
15. 15.True or false: a fuse is a resistance knob. (a) True (b) False
16. 16.What does a capacitor do? (a) beeps for an alarm (b) makes things spin (c) stores a little charge (d) lets current go one way
17. 17.True or false: a resistor limits the current. (a) False (b) True
18. 18.🧩 Which component blows if current is high? (a) diode (b) thermistor (c) motor (d) fuse
19. 19.🧩 Which component limits the current? (a) buzzer (b) fuse (c) resistor (d) capacitor
20. 20.True or false: a resistor is a resistance knob. (a) True (b) False
21. 21.🧩 Which component beeps for an alarm? (a) motor (b) diode (c) resistor (d) buzzer
22. 22.What does a thermistor do? (a) senses how hot it is (b) limits the current (c) smooths a wobbly supply (d) makes things spin
23. 23.What does a buzzer do? (a) glows using little power (b) is a resistance knob (c) senses how bright it is (d) beeps for an alarm
24. 24.True or false: a resistor has coloured bands. (a) True (b) False
25. 25.What does a fuse do? (a) senses how bright it is (b) glows using little power (c) has coloured bands (d) blows if current is high
26. 26.True or false: a transistor smooths a wobbly supply. (a) True (b) False
27. 27.What does a transistor do? (a) boosts a small signal (b) blows if current is high (c) stores a little charge (d) is a resistance knob
28. 28.🧩 Which part changes electrical energy into movement? (a) a motor (b) a fuse (c) an LED (d) a resistor
29. 29.True or false: a buzzer makes a beeping sound. (a) False (b) True
30. 30.🧩 Which component is a resistance knob? (a) transistor (b) buzzer (c) LDR (d) potentiometer
31. 31.True or false: a resistor stores a little charge. (a) False (b) True
32. 32.True or false: a transistor makes a beeping sound. (a) False (b) True
33. 33.What does a motor do? (a) smooths a wobbly supply (b) makes a beeping sound (c) lets current go one way (d) turns a fan or wheels
34. 34.What does a diode do? (a) lets current go one way (b) boosts a small signal (c) stores a little charge (d) senses how hot it is
35. 35.True or false: an LDR has coloured bands. (a) False (b) True
36. 36.True or false: a diode boosts a small signal. (a) False (b) True
37. 37.True or false: an LED makes things spin. (a) False (b) True
38. 38.True or false: a capacitor limits the current. (a) True (b) False
39. 39.True or false: a potentiometer smooths a wobbly supply. (a) True (b) False
40. 40.True or false: an LDR makes a beeping sound. (a) False (b) True

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