Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 466 · 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 beeps for an alarm? (a) LED (b) buzzer (c) transistor (d) thermistor
2. 2.True or false: a thermistor senses how hot it is. (a) False (b) True
3. 3.🧩 Which component makes things spin? (a) motor (b) resistor (c) LED (d) thermistor
4. 4.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
5. 5.True or false: a transistor makes a beeping sound. (a) True (b) False
6. 6.True or false: a transistor boosts a small signal. (a) False (b) True
7. 7.🧩 Which component limits the current? (a) fuse (b) thermistor (c) resistor (d) LDR
8. 8.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a diode (c) a buzzer (d) a resistor
9. 9.🧩 Which component turns a fan or wheels? (a) motor (b) thermistor (c) capacitor (d) transistor
10. 10.True or false: a buzzer makes a beeping sound. (a) False (b) True
11. 11.🧩 Which component blows if current is high? (a) thermistor (b) potentiometer (c) transistor (d) fuse
12. 12.🧩 Which component has coloured bands? (a) potentiometer (b) resistor (c) capacitor (d) fuse
13. 13.What does a transistor do? (a) boosts a small signal (b) limits the current (c) makes a beeping sound (d) lets current go one way
14. 14.True or false: a resistor has coloured bands. (a) True (b) False
15. 15.What does a motor do? (a) makes things spin (b) lets current go one way (c) beeps for an alarm (d) senses how hot it is
16. 16.🧩 Which component makes a beeping sound? (a) potentiometer (b) LDR (c) buzzer (d) capacitor
17. 17.True or false: a capacitor beeps for an alarm. (a) True (b) False
18. 18.What does a fuse do? (a) makes a beeping sound (b) smooths a wobbly supply (c) blows if current is high (d) stores a little charge
19. 19.🧩 Which component lets current go one way? (a) LDR (b) diode (c) transistor (d) fuse
20. 20.What does an LED do? (a) blows if current is high (b) smooths a wobbly supply (c) makes things spin (d) glows using little power
21. 21.True or false: a buzzer makes things spin. (a) True (b) False
22. 22.True or false: a buzzer beeps for an alarm. (a) False (b) True
23. 23.🧩 Which part changes electrical energy into movement? (a) a resistor (b) a motor (c) an LED (d) a fuse
24. 24.🧩 Which component boosts a small signal? (a) transistor (b) motor (c) resistor (d) thermistor
25. 25.True or false: a diode makes a beeping sound. (a) True (b) False
26. 26.What does a resistor do? (a) limits the current (b) makes things spin (c) glows using little power (d) boosts a small signal
27. 27.What does a resistor do? (a) makes a beeping sound (b) is a resistance knob (c) has coloured bands (d) makes things spin
28. 28.What does an LDR do? (a) senses how bright it is (b) makes a beeping sound (c) blows if current is high (d) smooths a wobbly supply
29. 29.What does a diode do? (a) lets current go one way (b) makes things spin (c) stores a little charge (d) senses how bright it is
30. 30.What does a buzzer do? (a) makes a beeping sound (b) blows if current is high (c) is a resistance knob (d) senses how hot it is
31. 31.What does a potentiometer do? (a) stores a little charge (b) turns a fan or wheels (c) is a resistance knob (d) has coloured bands
32. 32.True or false: a transistor is a resistance knob. (a) True (b) False
33. 33.True or false: a resistor limits the current. (a) False (b) True
34. 34.🧩 Which component stores a little charge? (a) potentiometer (b) capacitor (c) transistor (d) motor
35. 35.True or false: a resistor senses how bright it is. (a) True (b) False
36. 36.🧩 Which component senses how bright it is? (a) LDR (b) thermistor (c) resistor (d) potentiometer
37. 37.True or false: an LED glows using little power. (a) False (b) True
38. 38.True or false: a motor turns a fan or wheels. (a) True (b) False
39. 39.What does a motor do? (a) stores a little charge (b) lets current go one way (c) turns a fan or wheels (d) boosts a small signal
40. 40.🧩 Which component senses how hot it is? (a) capacitor (b) buzzer (c) thermistor (d) fuse

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