Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 84 · 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 buzzer (c) a resistor (d) a diode
2. 2.🧩 A capacitor in a circuit can … (a) spin a wheel (b) make light (c) store charge briefly (d) measure heat
3. 3.What does a potentiometer do? (a) makes a beeping sound (b) boosts a small signal (c) lets current go one way (d) is a resistance knob
4. 4.True or false: a transistor makes things spin. (a) False (b) True
5. 5.🧩 Which component blows if current is high? (a) diode (b) fuse (c) LDR (d) resistor
6. 6.True or false: an LDR stores a little charge. (a) False (b) True
7. 7.🧩 Which component glows using little power? (a) resistor (b) potentiometer (c) transistor (d) LED
8. 8.🧩 Which component lets current go one way? (a) resistor (b) thermistor (c) LDR (d) diode
9. 9.True or false: a buzzer makes a beeping sound. (a) False (b) True
10. 10.True or false: a diode senses how bright it is. (a) True (b) False
11. 11.True or false: a potentiometer is a resistance knob. (a) True (b) False
12. 12.What does a resistor do? (a) makes a beeping sound (b) boosts a small signal (c) senses how hot it is (d) has coloured bands
13. 13.What does a thermistor do? (a) is a resistance knob (b) senses how hot it is (c) lets current go one way (d) beeps for an alarm
14. 14.True or false: a transistor boosts a small signal. (a) False (b) True
15. 15.What does a motor do? (a) glows using little power (b) stores a little charge (c) beeps for an alarm (d) makes things spin
16. 16.True or false: an LED turns a fan or wheels. (a) False (b) True
17. 17.What does a transistor do? (a) blows if current is high (b) boosts a small signal (c) lets current go one way (d) stores a little charge
18. 18.What does a fuse do? (a) makes a beeping sound (b) turns a fan or wheels (c) blows if current is high (d) boosts a small signal
19. 19.True or false: a diode senses how hot it is. (a) False (b) True
20. 20.🧩 Which component has coloured bands? (a) fuse (b) resistor (c) buzzer (d) potentiometer
21. 21.🧩 Which component beeps for an alarm? (a) fuse (b) LDR (c) capacitor (d) buzzer
22. 22.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a fuse (d) a motor
23. 23.What does a resistor do? (a) glows using little power (b) limits the current (c) senses how hot it is (d) smooths a wobbly supply
24. 24.What does a buzzer do? (a) makes a beeping sound (b) senses how bright it is (c) limits the current (d) senses how hot it is
25. 25.What does an LDR do? (a) senses how bright it is (b) stores a little charge (c) senses how hot it is (d) blows if current is high
26. 26.What does a buzzer do? (a) limits the current (b) beeps for an alarm (c) boosts a small signal (d) stores a little charge
27. 27.What does a capacitor do? (a) blows if current is high (b) stores a little charge (c) limits the current (d) glows using little power
28. 28.🧩 Which component makes things spin? (a) motor (b) diode (c) thermistor (d) capacitor
29. 29.True or false: a fuse is a resistance knob. (a) True (b) False
30. 30.🧩 Which component is a resistance knob? (a) capacitor (b) diode (c) potentiometer (d) resistor
31. 31.True or false: a motor turns a fan or wheels. (a) False (b) True
32. 32.True or false: a resistor glows using little power. (a) True (b) False
33. 33.True or false: an LDR glows using little power. (a) False (b) True
34. 34.True or false: an LDR limits the current. (a) True (b) False
35. 35.What does a diode do? (a) smooths a wobbly supply (b) glows using little power (c) senses how bright it is (d) lets current go one way
36. 36.True or false: an LED lets current go one way. (a) False (b) True
37. 37.🧩 Which component limits the current? (a) potentiometer (b) LED (c) resistor (d) transistor
38. 38.🧩 Which component smooths a wobbly supply? (a) LDR (b) fuse (c) thermistor (d) capacitor
39. 39.What does a capacitor do? (a) has coloured bands (b) smooths a wobbly supply (c) lets current go one way (d) limits the current
40. 40.🧩 Which component makes a beeping sound? (a) transistor (b) LED (c) buzzer (d) motor

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