Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 490 · 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 an LDR do? (a) limits the current (b) senses how hot it is (c) boosts a small signal (d) senses how bright it is
2. 2.True or false: a resistor has coloured bands. (a) False (b) True
3. 3.What does a transistor do? (a) is a resistance knob (b) senses how hot it is (c) boosts a small signal (d) beeps for an alarm
4. 4.🧩 Which component turns a fan or wheels? (a) potentiometer (b) LDR (c) transistor (d) motor
5. 5.🧩 Which component smooths a wobbly supply? (a) capacitor (b) thermistor (c) transistor (d) potentiometer
6. 6.True or false: a buzzer beeps for an alarm. (a) False (b) True
7. 7.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) make light (d) spin a wheel
8. 8.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
9. 9.🧩 Which component beeps for an alarm? (a) resistor (b) buzzer (c) capacitor (d) potentiometer
10. 10.True or false: an LDR glows using little power. (a) False (b) True
11. 11.What does a buzzer do? (a) stores a little charge (b) is a resistance knob (c) lets current go one way (d) makes a beeping sound
12. 12.True or false: a thermistor senses how hot it is. (a) True (b) False
13. 13.🧩 Which component blows if current is high? (a) resistor (b) capacitor (c) diode (d) fuse
14. 14.True or false: a diode senses how hot it is. (a) False (b) True
15. 15.🧩 Which component stores a little charge? (a) buzzer (b) LDR (c) capacitor (d) diode
16. 16.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a buzzer (d) a capacitor
17. 17.What does a buzzer do? (a) stores a little charge (b) senses how hot it is (c) glows using little power (d) beeps for an alarm
18. 18.🧩 Which component has coloured bands? (a) thermistor (b) LDR (c) resistor (d) diode
19. 19.What does a potentiometer do? (a) makes a beeping sound (b) turns a fan or wheels (c) is a resistance knob (d) blows if current is high
20. 20.True or false: a capacitor lets current go one way. (a) True (b) False
21. 21.What does a diode do? (a) senses how hot it is (b) blows if current is high (c) limits the current (d) lets current go one way
22. 22.🧩 Which component makes a beeping sound? (a) diode (b) transistor (c) buzzer (d) resistor
23. 23.What does a thermistor do? (a) glows using little power (b) is a resistance knob (c) makes things spin (d) senses how hot it is
24. 24.🧩 Which component senses how bright it is? (a) LDR (b) buzzer (c) potentiometer (d) diode
25. 25.🧩 Which component glows using little power? (a) transistor (b) LED (c) fuse (d) potentiometer
26. 26.What does a resistor do? (a) smooths a wobbly supply (b) turns a fan or wheels (c) stores a little charge (d) has coloured bands
27. 27.True or false: a resistor glows using little power. (a) True (b) False
28. 28.What does an LED do? (a) limits the current (b) makes things spin (c) glows using little power (d) has coloured bands
29. 29.True or false: a capacitor stores a little charge. (a) False (b) True
30. 30.True or false: a resistor limits the current. (a) True (b) False
31. 31.True or false: a motor makes things spin. (a) False (b) True
32. 32.What does a capacitor do? (a) glows using little power (b) stores a little charge (c) boosts a small signal (d) senses how hot it is
33. 33.🧩 Which component lets current go one way? (a) potentiometer (b) diode (c) LDR (d) fuse
34. 34.🧩 Which component makes things spin? (a) motor (b) LDR (c) potentiometer (d) diode
35. 35.True or false: a transistor senses how hot it is. (a) True (b) False
36. 36.True or false: a resistor lets current go one way. (a) False (b) True
37. 37.What does a resistor do? (a) beeps for an alarm (b) limits the current (c) blows if current is high (d) makes a beeping sound
38. 38.True or false: a potentiometer is a resistance knob. (a) True (b) False
39. 39.True or false: a capacitor is a resistance knob. (a) True (b) False
40. 40.What does a motor do? (a) is a resistance knob (b) makes things spin (c) glows using little power (d) stores a little charge

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