Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 646 · 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 diode do? (a) senses how hot it is (b) makes things spin (c) lets current go one way (d) beeps for an alarm
2. 2.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a diode (d) a buzzer
3. 3.What does an LED do? (a) is a resistance knob (b) makes a beeping sound (c) glows using little power (d) makes things spin
4. 4.🧩 A capacitor in a circuit can … (a) spin a wheel (b) measure heat (c) store charge briefly (d) make light
5. 5.True or false: a resistor has coloured bands. (a) False (b) True
6. 6.True or false: a motor makes things spin. (a) False (b) True
7. 7.🧩 Which component has coloured bands? (a) thermistor (b) buzzer (c) potentiometer (d) resistor
8. 8.What does a transistor do? (a) boosts a small signal (b) makes things spin (c) has coloured bands (d) blows if current is high
9. 9.What does an LDR do? (a) smooths a wobbly supply (b) is a resistance knob (c) senses how bright it is (d) stores a little charge
10. 10.True or false: a resistor limits the current. (a) True (b) False
11. 11.🧩 Which component glows using little power? (a) buzzer (b) thermistor (c) fuse (d) LED
12. 12.🧩 Which component beeps for an alarm? (a) potentiometer (b) LDR (c) buzzer (d) fuse
13. 13.🧩 Which component stores a little charge? (a) LDR (b) fuse (c) capacitor (d) buzzer
14. 14.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a resistor (d) a fuse
15. 15.What does a motor do? (a) limits the current (b) glows using little power (c) smooths a wobbly supply (d) turns a fan or wheels
16. 16.What does a potentiometer do? (a) smooths a wobbly supply (b) is a resistance knob (c) boosts a small signal (d) has coloured bands
17. 17.🧩 Which component limits the current? (a) thermistor (b) LDR (c) resistor (d) fuse
18. 18.🧩 Which component blows if current is high? (a) resistor (b) capacitor (c) LDR (d) fuse
19. 19.🧩 Which component senses how hot it is? (a) capacitor (b) motor (c) resistor (d) thermistor
20. 20.🧩 Which component senses how bright it is? (a) LDR (b) transistor (c) diode (d) potentiometer
21. 21.🧩 Which component smooths a wobbly supply? (a) resistor (b) capacitor (c) motor (d) diode
22. 22.True or false: a thermistor blows if current is high. (a) False (b) True
23. 23.🧩 Which component is a resistance knob? (a) potentiometer (b) resistor (c) buzzer (d) motor
24. 24.True or false: a thermistor turns a fan or wheels. (a) False (b) True
25. 25.True or false: a potentiometer limits the current. (a) False (b) True
26. 26.What does a thermistor do? (a) senses how hot it is (b) blows if current is high (c) beeps for an alarm (d) turns a fan or wheels
27. 27.🧩 Which component turns a fan or wheels? (a) buzzer (b) diode (c) capacitor (d) motor
28. 28.What does a capacitor do? (a) limits the current (b) stores a little charge (c) senses how hot it is (d) has coloured bands
29. 29.What does a buzzer do? (a) makes a beeping sound (b) stores a little charge (c) senses how hot it is (d) senses how bright it is
30. 30.What does a motor do? (a) makes things spin (b) smooths a wobbly supply (c) lets current go one way (d) boosts a small signal
31. 31.True or false: a potentiometer beeps for an alarm. (a) True (b) False
32. 32.True or false: a capacitor senses how hot it is. (a) False (b) True
33. 33.True or false: an LED glows using little power. (a) False (b) True
34. 34.True or false: a potentiometer makes a beeping sound. (a) True (b) False
35. 35.True or false: a diode lets current go one way. (a) False (b) True
36. 36.True or false: a buzzer lets current go one way. (a) True (b) False
37. 37.True or false: a potentiometer lets current go one way. (a) False (b) True
38. 38.What does a capacitor do? (a) smooths a wobbly supply (b) senses how hot it is (c) lets current go one way (d) is a resistance knob
39. 39.What does a fuse do? (a) blows if current is high (b) senses how hot it is (c) glows using little power (d) lets current go one way
40. 40.🧩 Which component lets current go one way? (a) LDR (b) LED (c) transistor (d) diode

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