Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 698 · 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.True or false: a diode smooths a wobbly supply. (a) True (b) False
2. 2.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) a fuse (d) an LED
3. 3.What does a transistor do? (a) stores a little charge (b) turns a fan or wheels (c) boosts a small signal (d) smooths a wobbly supply
4. 4.🧩 Which component smooths a wobbly supply? (a) capacitor (b) motor (c) LDR (d) fuse
5. 5.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) measure heat (d) spin a wheel
6. 6.🧩 Which component boosts a small signal? (a) transistor (b) potentiometer (c) motor (d) capacitor
7. 7.What does a buzzer do? (a) is a resistance knob (b) makes things spin (c) beeps for an alarm (d) stores a little charge
8. 8.True or false: an LED has coloured bands. (a) False (b) True
9. 9.🧩 Which component limits the current? (a) potentiometer (b) diode (c) resistor (d) LED
10. 10.What does an LED do? (a) senses how bright it is (b) is a resistance knob (c) glows using little power (d) has coloured bands
11. 11.What does a resistor do? (a) glows using little power (b) limits the current (c) blows if current is high (d) smooths a wobbly supply
12. 12.What does a diode do? (a) senses how bright it is (b) beeps for an alarm (c) limits the current (d) lets current go one way
13. 13.True or false: an LDR turns a fan or wheels. (a) False (b) True
14. 14.What does a resistor do? (a) makes things spin (b) stores a little charge (c) senses how hot it is (d) has coloured bands
15. 15.What does a motor do? (a) beeps for an alarm (b) glows using little power (c) turns a fan or wheels (d) has coloured bands
16. 16.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
17. 17.True or false: a buzzer makes a beeping sound. (a) False (b) True
18. 18.What does a thermistor do? (a) limits the current (b) has coloured bands (c) senses how hot it is (d) senses how bright it is
19. 19.🧩 Which component is a resistance knob? (a) potentiometer (b) capacitor (c) thermistor (d) diode
20. 20.🧩 Which component blows if current is high? (a) resistor (b) fuse (c) thermistor (d) motor
21. 21.🧩 Which component beeps for an alarm? (a) LDR (b) motor (c) potentiometer (d) buzzer
22. 22.What does a buzzer do? (a) senses how bright it is (b) makes a beeping sound (c) boosts a small signal (d) stores a little charge
23. 23.🧩 Which component glows using little power? (a) diode (b) resistor (c) LED (d) transistor
24. 24.True or false: a potentiometer lets current go one way. (a) False (b) True
25. 25.True or false: a capacitor stores a little charge. (a) False (b) True
26. 26.True or false: an LDR senses how bright it is. (a) True (b) False
27. 27.🧩 Which component senses how bright it is? (a) diode (b) buzzer (c) motor (d) LDR
28. 28.🧩 Which component stores a little charge? (a) potentiometer (b) capacitor (c) thermistor (d) motor
29. 29.True or false: a capacitor limits the current. (a) True (b) False
30. 30.🧩 Which component lets current go one way? (a) potentiometer (b) motor (c) diode (d) transistor
31. 31.What does a fuse do? (a) senses how bright it is (b) limits the current (c) blows if current is high (d) glows using little power
32. 32.True or false: a potentiometer boosts a small signal. (a) True (b) False
33. 33.True or false: a buzzer blows if current is high. (a) True (b) False
34. 34.🧩 Which component makes things spin? (a) fuse (b) motor (c) LED (d) potentiometer
35. 35.What does a potentiometer do? (a) blows if current is high (b) is a resistance knob (c) makes a beeping sound (d) has coloured bands
36. 36.True or false: a potentiometer is a resistance knob. (a) True (b) False
37. 37.What does an LDR do? (a) beeps for an alarm (b) turns a fan or wheels (c) is a resistance knob (d) senses how bright it is
38. 38.True or false: a motor limits the current. (a) True (b) False
39. 39.True or false: a motor makes things spin. (a) False (b) True
40. 40.🧩 Which component turns a fan or wheels? (a) diode (b) potentiometer (c) motor (d) transistor

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