Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 664 · 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) transistor (b) potentiometer (c) capacitor (d) fuse
2. 2.🧩 A capacitor in a circuit can … (a) make light (b) store charge briefly (c) measure heat (d) spin a wheel
3. 3.What does a resistor do? (a) has coloured bands (b) senses how bright it is (c) glows using little power (d) boosts a small signal
4. 4.True or false: a buzzer makes things spin. (a) True (b) False
5. 5.What does an LDR do? (a) boosts a small signal (b) senses how bright it is (c) smooths a wobbly supply (d) makes a beeping sound
6. 6.What does an LED do? (a) glows using little power (b) senses how hot it is (c) makes a beeping sound (d) beeps for an alarm
7. 7.🧩 Which part changes electrical energy into movement? (a) a motor (b) a resistor (c) a fuse (d) an LED
8. 8.🧩 Which component has coloured bands? (a) buzzer (b) potentiometer (c) resistor (d) fuse
9. 9.True or false: a transistor boosts a small signal. (a) True (b) False
10. 10.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a resistor (d) a diode
11. 11.🧩 Which component senses how hot it is? (a) LDR (b) thermistor (c) transistor (d) LED
12. 12.What does a buzzer do? (a) has coloured bands (b) glows using little power (c) is a resistance knob (d) beeps for an alarm
13. 13.🧩 Which component glows using little power? (a) LED (b) resistor (c) motor (d) thermistor
14. 14.What does a resistor do? (a) makes things spin (b) stores a little charge (c) lets current go one way (d) limits the current
15. 15.What does a diode do? (a) lets current go one way (b) beeps for an alarm (c) has coloured bands (d) senses how hot it is
16. 16.What does a potentiometer do? (a) stores a little charge (b) lets current go one way (c) is a resistance knob (d) blows if current is high
17. 17.🧩 Which component limits the current? (a) thermistor (b) buzzer (c) LED (d) resistor
18. 18.What does a thermistor do? (a) smooths a wobbly supply (b) stores a little charge (c) senses how hot it is (d) beeps for an alarm
19. 19.True or false: a buzzer makes a beeping sound. (a) True (b) False
20. 20.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
21. 21.🧩 Which component beeps for an alarm? (a) diode (b) fuse (c) buzzer (d) capacitor
22. 22.What does a capacitor do? (a) lets current go one way (b) boosts a small signal (c) turns a fan or wheels (d) stores a little charge
23. 23.What does a buzzer do? (a) limits the current (b) turns a fan or wheels (c) stores a little charge (d) makes a beeping sound
24. 24.True or false: an LDR makes things spin. (a) False (b) True
25. 25.True or false: a fuse boosts a small signal. (a) True (b) False
26. 26.True or false: a potentiometer makes things spin. (a) False (b) True
27. 27.True or false: a capacitor stores a little charge. (a) False (b) True
28. 28.What does a capacitor do? (a) has coloured bands (b) lets current go one way (c) smooths a wobbly supply (d) senses how hot it is
29. 29.🧩 Which component is a resistance knob? (a) resistor (b) LED (c) potentiometer (d) transistor
30. 30.🧩 Which component makes things spin? (a) buzzer (b) fuse (c) LDR (d) motor
31. 31.🧩 Which component turns a fan or wheels? (a) LDR (b) motor (c) resistor (d) thermistor
32. 32.True or false: a potentiometer blows if current is high. (a) False (b) True
33. 33.True or false: an LED is a resistance knob. (a) False (b) True
34. 34.🧩 Which component boosts a small signal? (a) transistor (b) potentiometer (c) diode (d) capacitor
35. 35.True or false: a diode lets current go one way. (a) True (b) False
36. 36.True or false: an LDR senses how bright it is. (a) False (b) True
37. 37.What does a transistor do? (a) limits the current (b) stores a little charge (c) boosts a small signal (d) blows if current is high
38. 38.🧩 Which component smooths a wobbly supply? (a) buzzer (b) diode (c) capacitor (d) LDR
39. 39.🧩 Which component stores a little charge? (a) LED (b) capacitor (c) motor (d) resistor
40. 40.True or false: a fuse blows if current is high. (a) False (b) True

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