Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 60 · 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 part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
2. 2.🧩 Which component stores a little charge? (a) fuse (b) LED (c) potentiometer (d) capacitor
3. 3.True or false: a motor is a resistance knob. (a) True (b) False
4. 4.True or false: a motor stores a little charge. (a) False (b) True
5. 5.🧩 Which component smooths a wobbly supply? (a) LDR (b) buzzer (c) capacitor (d) potentiometer
6. 6.What does a buzzer do? (a) beeps for an alarm (b) blows if current is high (c) turns a fan or wheels (d) limits the current
7. 7.🧩 Which component beeps for an alarm? (a) LDR (b) fuse (c) buzzer (d) thermistor
8. 8.🧩 Which component lets current go one way? (a) resistor (b) diode (c) LDR (d) capacitor
9. 9.True or false: a motor turns a fan or wheels. (a) False (b) True
10. 10.What does a potentiometer do? (a) turns a fan or wheels (b) makes things spin (c) blows if current is high (d) is a resistance knob
11. 11.🧩 Which part changes electrical energy into movement? (a) an LED (b) a motor (c) a resistor (d) a fuse
12. 12.🧩 Which component boosts a small signal? (a) resistor (b) fuse (c) transistor (d) LED
13. 13.🧩 Which component glows using little power? (a) transistor (b) potentiometer (c) LED (d) resistor
14. 14.What does a fuse do? (a) blows if current is high (b) has coloured bands (c) limits the current (d) boosts a small signal
15. 15.🧩 Which component turns a fan or wheels? (a) motor (b) thermistor (c) diode (d) resistor
16. 16.🧩 Which component has coloured bands? (a) LDR (b) resistor (c) capacitor (d) motor
17. 17.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
18. 18.🧩 Which component limits the current? (a) potentiometer (b) fuse (c) resistor (d) LED
19. 19.True or false: a transistor has coloured bands. (a) True (b) False
20. 20.True or false: a transistor makes things spin. (a) False (b) True
21. 21.True or false: a thermistor smooths a wobbly supply. (a) False (b) True
22. 22.True or false: a buzzer makes a beeping sound. (a) False (b) True
23. 23.🧩 Which component is a resistance knob? (a) capacitor (b) LED (c) potentiometer (d) motor
24. 24.True or false: a diode glows using little power. (a) False (b) True
25. 25.What does a resistor do? (a) senses how hot it is (b) limits the current (c) senses how bright it is (d) makes things spin
26. 26.What does an LDR do? (a) beeps for an alarm (b) senses how bright it is (c) stores a little charge (d) has coloured bands
27. 27.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) spin a wheel (d) make light
28. 28.True or false: an LED smooths a wobbly supply. (a) False (b) True
29. 29.🧩 Which component senses how hot it is? (a) potentiometer (b) thermistor (c) LDR (d) buzzer
30. 30.True or false: an LED senses how hot it is. (a) True (b) False
31. 31.What does a transistor do? (a) senses how bright it is (b) boosts a small signal (c) senses how hot it is (d) stores a little charge
32. 32.🧩 Which component senses how bright it is? (a) thermistor (b) LDR (c) capacitor (d) resistor
33. 33.True or false: an LED blows if current is high. (a) False (b) True
34. 34.🧩 Which component makes a beeping sound? (a) potentiometer (b) capacitor (c) buzzer (d) motor
35. 35.🧩 Which component blows if current is high? (a) LED (b) thermistor (c) LDR (d) fuse
36. 36.True or false: a buzzer glows using little power. (a) True (b) False
37. 37.What does a resistor do? (a) blows if current is high (b) has coloured bands (c) makes a beeping sound (d) lets current go one way
38. 38.What does a capacitor do? (a) glows using little power (b) stores a little charge (c) makes things spin (d) turns a fan or wheels
39. 39.What does a motor do? (a) boosts a small signal (b) stores a little charge (c) smooths a wobbly supply (d) turns a fan or wheels
40. 40.True or false: a resistor is a resistance knob. (a) True (b) False

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