Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 305 · 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.True or false: a thermistor turns a fan or wheels. (a) False (b) True
2. 2.🧩 Which component limits the current? (a) thermistor (b) motor (c) LDR (d) resistor
3. 3.🧩 Which component beeps for an alarm? (a) resistor (b) fuse (c) buzzer (d) thermistor
4. 4.🧩 A capacitor in a circuit can … (a) store charge briefly (b) measure heat (c) make light (d) spin a wheel
5. 5.🧩 Which part changes electrical energy into movement? (a) a fuse (b) an LED (c) a resistor (d) a motor
6. 6.🧩 Which component has coloured bands? (a) resistor (b) buzzer (c) fuse (d) LDR
7. 7.🧩 Which component turns a fan or wheels? (a) buzzer (b) fuse (c) motor (d) LDR
8. 8.What does a buzzer do? (a) makes a beeping sound (b) blows if current is high (c) has coloured bands (d) turns a fan or wheels
9. 9.🧩 Which component smooths a wobbly supply? (a) motor (b) capacitor (c) LED (d) resistor
10. 10.What does a diode do? (a) stores a little charge (b) makes things spin (c) limits the current (d) lets current go one way
11. 11.🧩 Which component senses how bright it is? (a) resistor (b) fuse (c) LDR (d) transistor
12. 12.What does a fuse do? (a) limits the current (b) blows if current is high (c) is a resistance knob (d) smooths a wobbly supply
13. 13.What does a capacitor do? (a) senses how hot it is (b) has coloured bands (c) smooths a wobbly supply (d) turns a fan or wheels
14. 14.True or false: a capacitor stores a little charge. (a) False (b) True
15. 15.True or false: an LDR turns a fan or wheels. (a) False (b) True
16. 16.🧩 Which component makes a beeping sound? (a) diode (b) buzzer (c) transistor (d) resistor
17. 17.What does an LED do? (a) stores a little charge (b) senses how bright it is (c) glows using little power (d) is a resistance knob
18. 18.🧩 Which component blows if current is high? (a) fuse (b) LDR (c) diode (d) buzzer
19. 19.What does a motor do? (a) makes things spin (b) has coloured bands (c) glows using little power (d) senses how bright it is
20. 20.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a capacitor (c) a diode (d) a resistor
21. 21.🧩 Which component lets current go one way? (a) capacitor (b) thermistor (c) diode (d) LED
22. 22.What does a capacitor do? (a) senses how bright it is (b) boosts a small signal (c) lets current go one way (d) stores a little charge
23. 23.True or false: an LED stores a little charge. (a) True (b) False
24. 24.What does a resistor do? (a) senses how hot it is (b) has coloured bands (c) makes things spin (d) stores a little charge
25. 25.What does a transistor do? (a) boosts a small signal (b) turns a fan or wheels (c) makes things spin (d) has coloured bands
26. 26.True or false: a diode lets current go one way. (a) True (b) False
27. 27.What does a thermistor do? (a) senses how hot it is (b) stores a little charge (c) has coloured bands (d) glows using little power
28. 28.True or false: a buzzer has coloured bands. (a) True (b) False
29. 29.True or false: a resistor limits the current. (a) False (b) True
30. 30.True or false: a resistor stores a little charge. (a) False (b) True
31. 31.🧩 Which component makes things spin? (a) motor (b) potentiometer (c) resistor (d) fuse
32. 32.True or false: a thermistor is a resistance knob. (a) False (b) True
33. 33.True or false: a resistor has coloured bands. (a) False (b) True
34. 34.What does a potentiometer do? (a) makes things spin (b) blows if current is high (c) glows using little power (d) is a resistance knob
35. 35.What does an LDR do? (a) senses how bright it is (b) makes things spin (c) has coloured bands (d) beeps for an alarm
36. 36.🧩 Which component stores a little charge? (a) capacitor (b) buzzer (c) resistor (d) motor
37. 37.True or false: a diode blows if current is high. (a) True (b) False
38. 38.🧩 Which component boosts a small signal? (a) capacitor (b) buzzer (c) fuse (d) transistor
39. 39.True or false: a capacitor is a resistance knob. (a) True (b) False
40. 40.What does a resistor do? (a) blows if current is high (b) limits the current (c) stores a little charge (d) lets current go one way

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