Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 114 · 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 potentiometer do? (a) is a resistance knob (b) glows using little power (c) blows if current is high (d) senses how bright it is
2. 2.🧩 Which component lets current go one way? (a) LED (b) capacitor (c) diode (d) buzzer
3. 3.What does a diode do? (a) makes things spin (b) beeps for an alarm (c) senses how bright it is (d) lets current go one way
4. 4.True or false: a potentiometer makes things spin. (a) True (b) False
5. 5.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a diode (d) a resistor
6. 6.What does a fuse do? (a) blows if current is high (b) stores a little charge (c) makes a beeping sound (d) senses how bright it is
7. 7.True or false: an LDR senses how bright it is. (a) True (b) False
8. 8.🧩 Which component senses how bright it is? (a) motor (b) LDR (c) LED (d) thermistor
9. 9.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
10. 10.What does a capacitor do? (a) makes things spin (b) beeps for an alarm (c) stores a little charge (d) blows if current is high
11. 11.What does a capacitor do? (a) limits the current (b) smooths a wobbly supply (c) makes things spin (d) glows using little power
12. 12.True or false: an LED glows using little power. (a) False (b) True
13. 13.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) spin a wheel (d) measure heat
14. 14.True or false: a thermistor turns a fan or wheels. (a) True (b) False
15. 15.🧩 Which component beeps for an alarm? (a) motor (b) capacitor (c) buzzer (d) transistor
16. 16.True or false: a diode boosts a small signal. (a) True (b) False
17. 17.True or false: an LDR stores a little charge. (a) False (b) True
18. 18.🧩 Which component glows using little power? (a) LDR (b) diode (c) capacitor (d) LED
19. 19.What does a motor do? (a) turns a fan or wheels (b) is a resistance knob (c) senses how hot it is (d) has coloured bands
20. 20.🧩 Which component limits the current? (a) LDR (b) transistor (c) buzzer (d) resistor
21. 21.True or false: a diode senses how bright it is. (a) False (b) True
22. 22.What does an LDR do? (a) stores a little charge (b) smooths a wobbly supply (c) senses how bright it is (d) beeps for an alarm
23. 23.What does a resistor do? (a) senses how bright it is (b) blows if current is high (c) makes a beeping sound (d) limits the current
24. 24.True or false: a resistor has coloured bands. (a) True (b) False
25. 25.True or false: a buzzer makes a beeping sound. (a) True (b) False
26. 26.True or false: a transistor smooths a wobbly supply. (a) True (b) False
27. 27.What does a transistor do? (a) beeps for an alarm (b) turns a fan or wheels (c) boosts a small signal (d) makes things spin
28. 28.What does a motor do? (a) makes a beeping sound (b) senses how hot it is (c) beeps for an alarm (d) makes things spin
29. 29.What does an LED do? (a) glows using little power (b) stores a little charge (c) limits the current (d) makes things spin
30. 30.🧩 Which component has coloured bands? (a) LED (b) LDR (c) thermistor (d) resistor
31. 31.🧩 Which component is a resistance knob? (a) LED (b) transistor (c) potentiometer (d) capacitor
32. 32.True or false: a capacitor stores a little charge. (a) False (b) True
33. 33.What does a resistor do? (a) smooths a wobbly supply (b) senses how bright it is (c) has coloured bands (d) lets current go one way
34. 34.🧩 Which component makes a beeping sound? (a) buzzer (b) diode (c) capacitor (d) resistor
35. 35.What does a thermistor do? (a) makes a beeping sound (b) turns a fan or wheels (c) senses how hot it is (d) senses how bright it is
36. 36.🧩 Which component senses how hot it is? (a) motor (b) transistor (c) thermistor (d) potentiometer
37. 37.True or false: an LDR boosts a small signal. (a) False (b) True
38. 38.🧩 Which component blows if current is high? (a) LDR (b) capacitor (c) buzzer (d) fuse
39. 39.True or false: a fuse senses how bright it is. (a) False (b) True
40. 40.🧩 Which component smooths a wobbly supply? (a) motor (b) fuse (c) capacitor (d) transistor

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