Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 573 · 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) spin a wheel (b) make light (c) measure heat (d) store charge briefly
2. 2.True or false: a fuse senses how bright it is. (a) True (b) False
3. 3.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a fuse (d) a motor
4. 4.🧩 Which component smooths a wobbly supply? (a) LED (b) thermistor (c) capacitor (d) resistor
5. 5.🧩 Which component has coloured bands? (a) diode (b) potentiometer (c) resistor (d) LDR
6. 6.True or false: a fuse blows if current is high. (a) False (b) True
7. 7.True or false: a potentiometer lets current go one way. (a) False (b) True
8. 8.What does a diode do? (a) boosts a small signal (b) lets current go one way (c) senses how bright it is (d) has coloured bands
9. 9.🧩 Which component makes things spin? (a) motor (b) potentiometer (c) capacitor (d) LDR
10. 10.True or false: a motor makes things spin. (a) True (b) False
11. 11.🧩 Which component senses how hot it is? (a) LED (b) capacitor (c) thermistor (d) buzzer
12. 12.True or false: a resistor has coloured bands. (a) False (b) True
13. 13.What does a potentiometer do? (a) is a resistance knob (b) stores a little charge (c) boosts a small signal (d) makes things spin
14. 14.🧩 Which component lets current go one way? (a) diode (b) potentiometer (c) capacitor (d) transistor
15. 15.True or false: a potentiometer beeps for an alarm. (a) False (b) True
16. 16.True or false: a buzzer turns a fan or wheels. (a) True (b) False
17. 17.What does a resistor do? (a) senses how hot it is (b) makes things spin (c) smooths a wobbly supply (d) has coloured bands
18. 18.What does a buzzer do? (a) senses how hot it is (b) beeps for an alarm (c) glows using little power (d) boosts a small signal
19. 19.True or false: a capacitor stores a little charge. (a) False (b) True
20. 20.True or false: a fuse makes a beeping sound. (a) True (b) False
21. 21.What does a thermistor do? (a) senses how hot it is (b) turns a fan or wheels (c) boosts a small signal (d) makes a beeping sound
22. 22.🧩 Which component senses how bright it is? (a) LDR (b) diode (c) transistor (d) potentiometer
23. 23.🧩 Which component stores a little charge? (a) capacitor (b) resistor (c) LED (d) thermistor
24. 24.What does an LDR do? (a) lets current go one way (b) senses how bright it is (c) blows if current is high (d) makes a beeping sound
25. 25.🧩 Which component boosts a small signal? (a) resistor (b) buzzer (c) capacitor (d) transistor
26. 26.What does a fuse do? (a) boosts a small signal (b) is a resistance knob (c) limits the current (d) blows if current is high
27. 27.🧩 Which component turns a fan or wheels? (a) fuse (b) LDR (c) buzzer (d) motor
28. 28.🧩 Which part changes electrical energy into sound? (a) a diode (b) a resistor (c) a buzzer (d) a capacitor
29. 29.True or false: an LDR senses how bright it is. (a) True (b) False
30. 30.True or false: a buzzer makes a beeping sound. (a) False (b) True
31. 31.🧩 Which component makes a beeping sound? (a) buzzer (b) capacitor (c) LDR (d) motor
32. 32.What does a motor do? (a) senses how bright it is (b) senses how hot it is (c) limits the current (d) makes things spin
33. 33.True or false: an LDR limits the current. (a) False (b) True
34. 34.True or false: a transistor is a resistance knob. (a) False (b) True
35. 35.True or false: a potentiometer makes a beeping sound. (a) True (b) False
36. 36.True or false: a resistor limits the current. (a) True (b) False
37. 37.What does a resistor do? (a) senses how hot it is (b) limits the current (c) turns a fan or wheels (d) makes a beeping sound
38. 38.🧩 Which component limits the current? (a) LED (b) buzzer (c) resistor (d) thermistor
39. 39.🧩 Which component glows using little power? (a) motor (b) transistor (c) fuse (d) LED
40. 40.What does a motor do? (a) senses how bright it is (b) turns a fan or wheels (c) limits the current (d) senses how hot it is

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