Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 600 · 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 blows if current is high? (a) LED (b) LDR (c) fuse (d) resistor
2. 2.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) spin a wheel (d) store charge briefly
3. 3.What does a diode do? (a) smooths a wobbly supply (b) boosts a small signal (c) senses how bright it is (d) lets current go one way
4. 4.🧩 Which component boosts a small signal? (a) fuse (b) LED (c) transistor (d) capacitor
5. 5.What does a motor do? (a) glows using little power (b) beeps for an alarm (c) makes a beeping sound (d) makes things spin
6. 6.🧩 Which component senses how bright it is? (a) capacitor (b) LDR (c) motor (d) diode
7. 7.What does an LDR do? (a) senses how hot it is (b) stores a little charge (c) lets current go one way (d) senses how bright it is
8. 8.True or false: a buzzer makes a beeping sound. (a) True (b) False
9. 9.What does a potentiometer do? (a) is a resistance knob (b) blows if current is high (c) lets current go one way (d) senses how bright it is
10. 10.True or false: a capacitor stores a little charge. (a) False (b) True
11. 11.True or false: a transistor beeps for an alarm. (a) False (b) True
12. 12.True or false: a capacitor senses how bright it is. (a) False (b) True
13. 13.What does a resistor do? (a) makes things spin (b) limits the current (c) boosts a small signal (d) is a resistance knob
14. 14.🧩 Which component lets current go one way? (a) LED (b) thermistor (c) capacitor (d) diode
15. 15.What does a buzzer do? (a) senses how bright it is (b) boosts a small signal (c) makes things spin (d) makes a beeping sound
16. 16.What does a transistor do? (a) makes things spin (b) stores a little charge (c) has coloured bands (d) boosts a small signal
17. 17.🧩 Which component limits the current? (a) fuse (b) resistor (c) motor (d) transistor
18. 18.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a diode (d) a resistor
19. 19.🧩 Which component makes things spin? (a) buzzer (b) transistor (c) motor (d) diode
20. 20.🧩 Which component makes a beeping sound? (a) diode (b) resistor (c) motor (d) buzzer
21. 21.True or false: a transistor turns a fan or wheels. (a) False (b) True
22. 22.🧩 Which component turns a fan or wheels? (a) motor (b) buzzer (c) fuse (d) resistor
23. 23.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
24. 24.🧩 Which component has coloured bands? (a) thermistor (b) resistor (c) capacitor (d) potentiometer
25. 25.What does a thermistor do? (a) makes things spin (b) limits the current (c) senses how hot it is (d) senses how bright it is
26. 26.🧩 Which component stores a little charge? (a) buzzer (b) capacitor (c) motor (d) resistor
27. 27.True or false: a resistor is a resistance knob. (a) False (b) True
28. 28.🧩 Which component smooths a wobbly supply? (a) fuse (b) thermistor (c) capacitor (d) transistor
29. 29.True or false: an LDR senses how bright it is. (a) False (b) True
30. 30.🧩 Which component senses how hot it is? (a) buzzer (b) transistor (c) thermistor (d) potentiometer
31. 31.True or false: a transistor senses how hot it is. (a) False (b) True
32. 32.🧩 Which component glows using little power? (a) LED (b) motor (c) buzzer (d) resistor
33. 33.True or false: a buzzer limits the current. (a) True (b) False
34. 34.What does a fuse do? (a) limits the current (b) blows if current is high (c) senses how hot it is (d) has coloured bands
35. 35.What does a capacitor do? (a) stores a little charge (b) makes a beeping sound (c) limits the current (d) beeps for an alarm
36. 36.What does a motor do? (a) blows if current is high (b) turns a fan or wheels (c) lets current go one way (d) glows using little power
37. 37.True or false: a diode blows if current is high. (a) True (b) False
38. 38.True or false: a resistor limits the current. (a) True (b) False
39. 39.True or false: a thermistor senses how hot it is. (a) True (b) False
40. 40.What does a capacitor do? (a) senses how hot it is (b) makes a beeping sound (c) beeps for an alarm (d) smooths a wobbly supply

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