Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 312 · 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.🧩 A capacitor in a circuit can … (a) store charge briefly (b) spin a wheel (c) measure heat (d) make light
2. 2.🧩 Which component makes things spin? (a) LED (b) resistor (c) diode (d) motor
3. 3.What does an LED do? (a) senses how bright it is (b) glows using little power (c) beeps for an alarm (d) lets current go one way
4. 4.True or false: a capacitor senses how bright it is. (a) False (b) True
5. 5.What does a resistor do? (a) senses how bright it is (b) stores a little charge (c) boosts a small signal (d) limits the current
6. 6.🧩 Which component glows using little power? (a) potentiometer (b) LED (c) diode (d) capacitor
7. 7.What does an LDR do? (a) turns a fan or wheels (b) beeps for an alarm (c) senses how bright it is (d) lets current go one way
8. 8.True or false: a diode lets current go one way. (a) True (b) False
9. 9.🧩 Which component blows if current is high? (a) fuse (b) LDR (c) potentiometer (d) diode
10. 10.What does a buzzer do? (a) senses how hot it is (b) has coloured bands (c) smooths a wobbly supply (d) beeps for an alarm
11. 11.What does a capacitor do? (a) limits the current (b) smooths a wobbly supply (c) blows if current is high (d) boosts a small signal
12. 12.What does a thermistor do? (a) limits the current (b) beeps for an alarm (c) senses how bright it is (d) senses how hot it is
13. 13.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a fuse (d) a resistor
14. 14.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a diode (c) a buzzer (d) a capacitor
15. 15.What does a transistor do? (a) lets current go one way (b) glows using little power (c) turns a fan or wheels (d) boosts a small signal
16. 16.What does a resistor do? (a) stores a little charge (b) has coloured bands (c) glows using little power (d) turns a fan or wheels
17. 17.True or false: an LED glows using little power. (a) False (b) True
18. 18.What does a motor do? (a) stores a little charge (b) is a resistance knob (c) smooths a wobbly supply (d) makes things spin
19. 19.What does a potentiometer do? (a) senses how bright it is (b) is a resistance knob (c) makes things spin (d) smooths a wobbly supply
20. 20.🧩 Which component has coloured bands? (a) resistor (b) capacitor (c) buzzer (d) LED
21. 21.True or false: a transistor boosts a small signal. (a) True (b) False
22. 22.🧩 Which component senses how hot it is? (a) thermistor (b) LDR (c) transistor (d) fuse
23. 23.🧩 Which component boosts a small signal? (a) capacitor (b) buzzer (c) diode (d) transistor
24. 24.🧩 Which component lets current go one way? (a) potentiometer (b) diode (c) capacitor (d) buzzer
25. 25.What does a buzzer do? (a) smooths a wobbly supply (b) stores a little charge (c) makes a beeping sound (d) is a resistance knob
26. 26.🧩 Which component smooths a wobbly supply? (a) transistor (b) diode (c) capacitor (d) resistor
27. 27.True or false: a thermistor senses how hot it is. (a) False (b) True
28. 28.🧩 Which component limits the current? (a) diode (b) LDR (c) resistor (d) transistor
29. 29.True or false: a potentiometer is a resistance knob. (a) False (b) True
30. 30.🧩 Which component senses how bright it is? (a) transistor (b) capacitor (c) LDR (d) motor
31. 31.🧩 Which component stores a little charge? (a) buzzer (b) thermistor (c) capacitor (d) motor
32. 32.True or false: a fuse boosts a small signal. (a) False (b) True
33. 33.True or false: a motor turns a fan or wheels. (a) False (b) True
34. 34.True or false: a buzzer blows if current is high. (a) False (b) True
35. 35.True or false: a potentiometer blows if current is high. (a) False (b) True
36. 36.True or false: a fuse limits the current. (a) True (b) False
37. 37.🧩 Which component is a resistance knob? (a) buzzer (b) potentiometer (c) fuse (d) resistor
38. 38.🧩 Which component makes a beeping sound? (a) capacitor (b) buzzer (c) transistor (d) motor
39. 39.🧩 Which component beeps for an alarm? (a) LED (b) potentiometer (c) buzzer (d) capacitor
40. 40.What does a diode do? (a) limits the current (b) smooths a wobbly supply (c) lets current go one way (d) senses how bright it is

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