Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 41 · 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 makes things spin? (a) potentiometer (b) fuse (c) capacitor (d) motor
2. 2.🧩 Which component blows if current is high? (a) motor (b) thermistor (c) fuse (d) capacitor
3. 3.🧩 A capacitor in a circuit can … (a) store charge briefly (b) spin a wheel (c) make light (d) measure heat
4. 4.True or false: a buzzer beeps for an alarm. (a) True (b) False
5. 5.🧩 Which component limits the current? (a) motor (b) diode (c) capacitor (d) resistor
6. 6.True or false: a fuse blows if current is high. (a) True (b) False
7. 7.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a resistor (c) a capacitor (d) a diode
8. 8.What does an LDR do? (a) senses how bright it is (b) is a resistance knob (c) makes a beeping sound (d) turns a fan or wheels
9. 9.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
10. 10.🧩 Which component is a resistance knob? (a) potentiometer (b) transistor (c) motor (d) diode
11. 11.What does a capacitor do? (a) makes a beeping sound (b) boosts a small signal (c) senses how hot it is (d) stores a little charge
12. 12.🧩 Which component lets current go one way? (a) motor (b) LED (c) buzzer (d) diode
13. 13.What does a potentiometer do? (a) is a resistance knob (b) turns a fan or wheels (c) limits the current (d) makes a beeping sound
14. 14.True or false: a buzzer smooths a wobbly supply. (a) False (b) True
15. 15.🧩 Which component stores a little charge? (a) buzzer (b) LDR (c) capacitor (d) diode
16. 16.True or false: a potentiometer senses how hot it is. (a) False (b) True
17. 17.🧩 Which component senses how hot it is? (a) resistor (b) thermistor (c) capacitor (d) diode
18. 18.🧩 Which component glows using little power? (a) LDR (b) buzzer (c) capacitor (d) LED
19. 19.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
20. 20.True or false: a resistor smooths a wobbly supply. (a) True (b) False
21. 21.What does an LED do? (a) is a resistance knob (b) makes things spin (c) glows using little power (d) has coloured bands
22. 22.What does a fuse do? (a) blows if current is high (b) smooths a wobbly supply (c) has coloured bands (d) senses how hot it is
23. 23.True or false: an LDR senses how bright it is. (a) True (b) False
24. 24.🧩 Which component boosts a small signal? (a) transistor (b) motor (c) diode (d) capacitor
25. 25.🧩 Which component senses how bright it is? (a) buzzer (b) LDR (c) thermistor (d) fuse
26. 26.What does a capacitor do? (a) blows if current is high (b) smooths a wobbly supply (c) boosts a small signal (d) makes a beeping sound
27. 27.True or false: a potentiometer is a resistance knob. (a) True (b) False
28. 28.True or false: a buzzer senses how hot it is. (a) False (b) True
29. 29.🧩 Which component beeps for an alarm? (a) motor (b) diode (c) buzzer (d) LDR
30. 30.True or false: a capacitor stores a little charge. (a) True (b) False
31. 31.🧩 Which component smooths a wobbly supply? (a) resistor (b) LED (c) capacitor (d) motor
32. 32.True or false: a potentiometer stores a little charge. (a) True (b) False
33. 33.🧩 Which component makes a beeping sound? (a) buzzer (b) transistor (c) resistor (d) capacitor
34. 34.What does a resistor do? (a) glows using little power (b) smooths a wobbly supply (c) stores a little charge (d) limits the current
35. 35.What does a transistor do? (a) makes a beeping sound (b) stores a little charge (c) makes things spin (d) boosts a small signal
36. 36.What does a thermistor do? (a) blows if current is high (b) is a resistance knob (c) senses how hot it is (d) senses how bright it is
37. 37.True or false: a resistor limits the current. (a) True (b) False
38. 38.What does a diode do? (a) blows if current is high (b) makes a beeping sound (c) stores a little charge (d) lets current go one way
39. 39.🧩 Which component has coloured bands? (a) potentiometer (b) motor (c) transistor (d) resistor
40. 40.🧩 Which component turns a fan or wheels? (a) transistor (b) resistor (c) buzzer (d) motor

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