Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 241 · 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 diode (b) a capacitor (c) a buzzer (d) a resistor
2. 2.True or false: a potentiometer is a resistance knob. (a) False (b) True
3. 3.True or false: a diode lets current go one way. (a) True (b) False
4. 4.True or false: a buzzer beeps for an alarm. (a) False (b) True
5. 5.🧩 Which component beeps for an alarm? (a) fuse (b) motor (c) buzzer (d) resistor
6. 6.What does an LDR do? (a) is a resistance knob (b) senses how bright it is (c) stores a little charge (d) smooths a wobbly supply
7. 7.True or false: a thermistor smooths a wobbly supply. (a) True (b) False
8. 8.True or false: a capacitor lets current go one way. (a) True (b) False
9. 9.🧩 Which component stores a little charge? (a) LED (b) capacitor (c) diode (d) motor
10. 10.What does a potentiometer do? (a) limits the current (b) makes a beeping sound (c) smooths a wobbly supply (d) is a resistance knob
11. 11.🧩 Which component is a resistance knob? (a) capacitor (b) potentiometer (c) thermistor (d) motor
12. 12.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
13. 13.🧩 Which component has coloured bands? (a) LED (b) transistor (c) resistor (d) capacitor
14. 14.🧩 Which component smooths a wobbly supply? (a) fuse (b) LED (c) capacitor (d) LDR
15. 15.True or false: a buzzer is a resistance knob. (a) False (b) True
16. 16.🧩 Which component makes things spin? (a) diode (b) potentiometer (c) motor (d) buzzer
17. 17.What does a diode do? (a) turns a fan or wheels (b) makes things spin (c) glows using little power (d) lets current go one way
18. 18.🧩 Which component senses how hot it is? (a) capacitor (b) buzzer (c) resistor (d) thermistor
19. 19.True or false: a motor makes things spin. (a) False (b) True
20. 20.🧩 Which component senses how bright it is? (a) LDR (b) motor (c) fuse (d) transistor
21. 21.What does a fuse do? (a) turns a fan or wheels (b) lets current go one way (c) blows if current is high (d) boosts a small signal
22. 22.🧩 Which component glows using little power? (a) motor (b) capacitor (c) fuse (d) LED
23. 23.What does a motor do? (a) glows using little power (b) limits the current (c) beeps for an alarm (d) makes things spin
24. 24.🧩 Which component limits the current? (a) resistor (b) LED (c) fuse (d) thermistor
25. 25.🧩 Which component blows if current is high? (a) capacitor (b) LDR (c) resistor (d) fuse
26. 26.🧩 A capacitor in a circuit can … (a) make light (b) measure heat (c) store charge briefly (d) spin a wheel
27. 27.What does a resistor do? (a) beeps for an alarm (b) blows if current is high (c) limits the current (d) makes things spin
28. 28.What does a buzzer do? (a) boosts a small signal (b) makes a beeping sound (c) senses how hot it is (d) has coloured bands
29. 29.What does a thermistor do? (a) smooths a wobbly supply (b) boosts a small signal (c) senses how bright it is (d) senses how hot it is
30. 30.What does an LED do? (a) makes things spin (b) senses how hot it is (c) turns a fan or wheels (d) glows using little power
31. 31.What does a motor do? (a) is a resistance knob (b) turns a fan or wheels (c) has coloured bands (d) makes a beeping sound
32. 32.True or false: a resistor senses how bright it is. (a) True (b) False
33. 33.True or false: a fuse blows if current is high. (a) False (b) True
34. 34.True or false: a transistor senses how bright it is. (a) True (b) False
35. 35.True or false: a motor boosts a small signal. (a) True (b) False
36. 36.True or false: a buzzer makes things spin. (a) True (b) False
37. 37.True or false: a resistor has coloured bands. (a) True (b) False
38. 38.What does a resistor do? (a) stores a little charge (b) makes a beeping sound (c) has coloured bands (d) smooths a wobbly supply
39. 39.🧩 Which component makes a beeping sound? (a) buzzer (b) diode (c) capacitor (d) thermistor
40. 40.True or false: a motor turns a fan or wheels. (a) True (b) False

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