Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 401 · 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) make light (d) spin a wheel
2. 2.What does an LDR do? (a) senses how bright it is (b) stores a little charge (c) has coloured bands (d) boosts a small signal
3. 3.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) an LED (d) a fuse
4. 4.🧩 Which component makes things spin? (a) fuse (b) LDR (c) capacitor (d) motor
5. 5.What does a resistor do? (a) turns a fan or wheels (b) boosts a small signal (c) blows if current is high (d) limits the current
6. 6.What does a capacitor do? (a) boosts a small signal (b) glows using little power (c) senses how bright it is (d) smooths a wobbly supply
7. 7.What does a buzzer do? (a) makes a beeping sound (b) limits the current (c) makes things spin (d) blows if current is high
8. 8.What does a capacitor do? (a) has coloured bands (b) is a resistance knob (c) stores a little charge (d) boosts a small signal
9. 9.What does a transistor do? (a) blows if current is high (b) beeps for an alarm (c) senses how bright it is (d) boosts a small signal
10. 10.What does a motor do? (a) is a resistance knob (b) has coloured bands (c) turns a fan or wheels (d) stores a little charge
11. 11.What does a fuse do? (a) has coloured bands (b) blows if current is high (c) glows using little power (d) senses how hot it is
12. 12.True or false: a fuse blows if current is high. (a) True (b) False
13. 13.🧩 Which component blows if current is high? (a) LDR (b) motor (c) fuse (d) LED
14. 14.🧩 Which component has coloured bands? (a) diode (b) resistor (c) motor (d) capacitor
15. 15.True or false: a thermistor limits the current. (a) True (b) False
16. 16.🧩 Which component limits the current? (a) LDR (b) diode (c) motor (d) resistor
17. 17.What does a resistor do? (a) smooths a wobbly supply (b) senses how hot it is (c) has coloured bands (d) stores a little charge
18. 18.What does a motor do? (a) boosts a small signal (b) makes things spin (c) senses how hot it is (d) beeps for an alarm
19. 19.What does an LED do? (a) has coloured bands (b) blows if current is high (c) glows using little power (d) boosts a small signal
20. 20.🧩 Which component senses how hot it is? (a) transistor (b) resistor (c) thermistor (d) diode
21. 21.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a diode (d) a resistor
22. 22.🧩 Which component senses how bright it is? (a) fuse (b) LED (c) thermistor (d) LDR
23. 23.🧩 Which component glows using little power? (a) LDR (b) diode (c) resistor (d) LED
24. 24.True or false: a thermistor senses how hot it is. (a) False (b) True
25. 25.What does a potentiometer do? (a) is a resistance knob (b) limits the current (c) senses how hot it is (d) makes things spin
26. 26.🧩 Which component boosts a small signal? (a) LED (b) capacitor (c) diode (d) transistor
27. 27.🧩 Which component turns a fan or wheels? (a) diode (b) buzzer (c) LDR (d) motor
28. 28.True or false: a fuse has coloured bands. (a) True (b) False
29. 29.🧩 Which component lets current go one way? (a) resistor (b) diode (c) buzzer (d) LED
30. 30.True or false: a fuse lets current go one way. (a) True (b) False
31. 31.🧩 Which component makes a beeping sound? (a) buzzer (b) thermistor (c) diode (d) resistor
32. 32.🧩 Which component stores a little charge? (a) capacitor (b) LED (c) motor (d) transistor
33. 33.True or false: a buzzer blows if current is high. (a) False (b) True
34. 34.What does a thermistor do? (a) stores a little charge (b) senses how hot it is (c) beeps for an alarm (d) glows using little power
35. 35.🧩 Which component smooths a wobbly supply? (a) diode (b) capacitor (c) LDR (d) fuse
36. 36.🧩 Which component is a resistance knob? (a) motor (b) buzzer (c) capacitor (d) potentiometer
37. 37.True or false: a diode lets current go one way. (a) False (b) True
38. 38.True or false: a resistor senses how hot it is. (a) False (b) True
39. 39.True or false: a fuse is a resistance knob. (a) False (b) True
40. 40.What does a buzzer do? (a) lets current go one way (b) senses how hot it is (c) stores a little charge (d) beeps for an alarm

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