Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 407 · 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.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) spin a wheel (d) make light
2. 2.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a buzzer (c) a diode (d) a capacitor
3. 3.What does a resistor do? (a) smooths a wobbly supply (b) limits the current (c) stores a little charge (d) glows using little power
4. 4.What does a transistor do? (a) has coloured bands (b) lets current go one way (c) turns a fan or wheels (d) boosts a small signal
5. 5.What does a resistor do? (a) has coloured bands (b) makes a beeping sound (c) turns a fan or wheels (d) beeps for an alarm
6. 6.🧩 Which component boosts a small signal? (a) transistor (b) diode (c) fuse (d) resistor
7. 7.🧩 Which component makes things spin? (a) resistor (b) LDR (c) capacitor (d) motor
8. 8.True or false: a capacitor stores a little charge. (a) False (b) True
9. 9.True or false: a resistor beeps for an alarm. (a) True (b) False
10. 10.True or false: a capacitor lets current go one way. (a) True (b) False
11. 11.What does a thermistor do? (a) glows using little power (b) lets current go one way (c) senses how hot it is (d) makes a beeping sound
12. 12.True or false: a buzzer is a resistance knob. (a) True (b) False
13. 13.What does a diode do? (a) makes things spin (b) smooths a wobbly supply (c) lets current go one way (d) beeps for an alarm
14. 14.🧩 Which component beeps for an alarm? (a) potentiometer (b) thermistor (c) transistor (d) buzzer
15. 15.🧩 Which component blows if current is high? (a) thermistor (b) fuse (c) LED (d) diode
16. 16.🧩 Which component is a resistance knob? (a) resistor (b) potentiometer (c) diode (d) LED
17. 17.True or false: a potentiometer is a resistance knob. (a) True (b) False
18. 18.What does an LED do? (a) is a resistance knob (b) beeps for an alarm (c) stores a little charge (d) glows using little power
19. 19.🧩 Which component smooths a wobbly supply? (a) thermistor (b) capacitor (c) fuse (d) LDR
20. 20.🧩 Which component turns a fan or wheels? (a) motor (b) buzzer (c) LDR (d) capacitor
21. 21.True or false: an LED limits the current. (a) False (b) True
22. 22.What does a potentiometer do? (a) is a resistance knob (b) lets current go one way (c) limits the current (d) makes a beeping sound
23. 23.🧩 Which component limits the current? (a) resistor (b) transistor (c) capacitor (d) fuse
24. 24.🧩 Which component glows using little power? (a) LED (b) capacitor (c) LDR (d) transistor
25. 25.🧩 Which component stores a little charge? (a) LDR (b) LED (c) diode (d) capacitor
26. 26.What does a motor do? (a) smooths a wobbly supply (b) beeps for an alarm (c) makes a beeping sound (d) makes things spin
27. 27.True or false: a buzzer beeps for an alarm. (a) False (b) True
28. 28.True or false: a motor turns a fan or wheels. (a) True (b) False
29. 29.True or false: an LDR senses how bright it is. (a) True (b) False
30. 30.🧩 Which component makes a beeping sound? (a) motor (b) buzzer (c) fuse (d) transistor
31. 31.🧩 Which component senses how bright it is? (a) capacitor (b) diode (c) motor (d) LDR
32. 32.What does a capacitor do? (a) lets current go one way (b) blows if current is high (c) smooths a wobbly supply (d) boosts a small signal
33. 33.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
34. 34.True or false: a transistor lets current go one way. (a) False (b) True
35. 35.True or false: a diode limits the current. (a) True (b) False
36. 36.What does a buzzer do? (a) is a resistance knob (b) turns a fan or wheels (c) makes a beeping sound (d) makes things spin
37. 37.What does a fuse do? (a) glows using little power (b) senses how hot it is (c) blows if current is high (d) has coloured bands
38. 38.True or false: a resistor glows using little power. (a) True (b) False
39. 39.What does a capacitor do? (a) boosts a small signal (b) stores a little charge (c) limits the current (d) senses how hot it is
40. 40.True or false: a fuse blows if current is high. (a) False (b) True

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