Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 121 · 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.What does a capacitor do? (a) smooths a wobbly supply (b) makes things spin (c) turns a fan or wheels (d) senses how bright it is
2. 2.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
3. 3.True or false: a buzzer makes a beeping sound. (a) False (b) True
4. 4.🧩 Which component has coloured bands? (a) fuse (b) potentiometer (c) thermistor (d) resistor
5. 5.What does a diode do? (a) is a resistance knob (b) turns a fan or wheels (c) lets current go one way (d) blows if current is high
6. 6.🧩 Which component smooths a wobbly supply? (a) potentiometer (b) transistor (c) thermistor (d) capacitor
7. 7.🧩 Which component turns a fan or wheels? (a) LED (b) motor (c) capacitor (d) thermistor
8. 8.🧩 Which component makes a beeping sound? (a) LDR (b) fuse (c) buzzer (d) resistor
9. 9.What does a motor do? (a) glows using little power (b) smooths a wobbly supply (c) limits the current (d) makes things spin
10. 10.True or false: a transistor blows if current is high. (a) False (b) True
11. 11.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
12. 12.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
13. 13.What does an LDR do? (a) senses how bright it is (b) senses how hot it is (c) lets current go one way (d) has coloured bands
14. 14.What does a resistor do? (a) limits the current (b) turns a fan or wheels (c) blows if current is high (d) makes a beeping sound
15. 15.🧩 Which component lets current go one way? (a) diode (b) transistor (c) potentiometer (d) motor
16. 16.True or false: a resistor makes things spin. (a) False (b) True
17. 17.True or false: a motor turns a fan or wheels. (a) False (b) True
18. 18.True or false: a potentiometer beeps for an alarm. (a) False (b) True
19. 19.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a buzzer (d) a capacitor
20. 20.What does a resistor do? (a) blows if current is high (b) has coloured bands (c) turns a fan or wheels (d) makes a beeping sound
21. 21.What does a buzzer do? (a) makes a beeping sound (b) is a resistance knob (c) boosts a small signal (d) limits the current
22. 22.🧩 Which component blows if current is high? (a) LDR (b) capacitor (c) diode (d) fuse
23. 23.🧩 Which component makes things spin? (a) buzzer (b) motor (c) thermistor (d) resistor
24. 24.🧩 Which component is a resistance knob? (a) LDR (b) potentiometer (c) diode (d) transistor
25. 25.True or false: a capacitor stores a little charge. (a) False (b) True
26. 26.🧩 Which component glows using little power? (a) motor (b) resistor (c) potentiometer (d) LED
27. 27.What does a thermistor do? (a) is a resistance knob (b) senses how hot it is (c) senses how bright it is (d) has coloured bands
28. 28.True or false: a thermistor senses how hot it is. (a) False (b) True
29. 29.True or false: a capacitor blows if current is high. (a) True (b) False
30. 30.True or false: an LDR boosts a small signal. (a) False (b) True
31. 31.True or false: a transistor lets current go one way. (a) False (b) True
32. 32.True or false: a transistor has coloured bands. (a) False (b) True
33. 33.🧩 Which component boosts a small signal? (a) LED (b) potentiometer (c) transistor (d) diode
34. 34.What does a fuse do? (a) lets current go one way (b) senses how hot it is (c) stores a little charge (d) blows if current is high
35. 35.What does an LED do? (a) has coloured bands (b) limits the current (c) senses how bright it is (d) glows using little power
36. 36.🧩 Which component limits the current? (a) motor (b) diode (c) potentiometer (d) resistor
37. 37.🧩 Which component senses how bright it is? (a) buzzer (b) LDR (c) capacitor (d) potentiometer
38. 38.What does a buzzer do? (a) makes things spin (b) turns a fan or wheels (c) has coloured bands (d) beeps for an alarm
39. 39.True or false: a potentiometer stores a little charge. (a) False (b) True
40. 40.True or false: a transistor smooths a wobbly supply. (a) False (b) True

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