Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 270 · 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 blows if current is high? (a) resistor (b) LED (c) fuse (d) buzzer
2. 2.True or false: a transistor beeps for an alarm. (a) False (b) True
3. 3.🧩 Which component makes things spin? (a) fuse (b) diode (c) buzzer (d) motor
4. 4.What does a capacitor do? (a) senses how bright it is (b) is a resistance knob (c) lets current go one way (d) smooths a wobbly supply
5. 5.🧩 Which component limits the current? (a) LED (b) capacitor (c) resistor (d) buzzer
6. 6.True or false: a diode beeps for an alarm. (a) False (b) True
7. 7.🧩 Which component makes a beeping sound? (a) LDR (b) capacitor (c) buzzer (d) motor
8. 8.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) an LED (d) a resistor
9. 9.True or false: a resistor lets current go one way. (a) False (b) True
10. 10.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
11. 11.🧩 Which component beeps for an alarm? (a) potentiometer (b) LDR (c) buzzer (d) resistor
12. 12.🧩 Which component senses how bright it is? (a) resistor (b) fuse (c) diode (d) LDR
13. 13.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
14. 14.True or false: a motor turns a fan or wheels. (a) True (b) False
15. 15.🧩 Which component smooths a wobbly supply? (a) resistor (b) capacitor (c) fuse (d) potentiometer
16. 16.What does a thermistor do? (a) beeps for an alarm (b) makes things spin (c) limits the current (d) senses how hot it is
17. 17.What does a buzzer do? (a) smooths a wobbly supply (b) stores a little charge (c) beeps for an alarm (d) boosts a small signal
18. 18.True or false: a motor blows if current is high. (a) False (b) True
19. 19.🧩 Which component stores a little charge? (a) capacitor (b) resistor (c) thermistor (d) LDR
20. 20.🧩 Which component senses how hot it is? (a) capacitor (b) thermistor (c) transistor (d) LED
21. 21.What does a motor do? (a) has coloured bands (b) turns a fan or wheels (c) blows if current is high (d) beeps for an alarm
22. 22.True or false: a capacitor stores a little charge. (a) False (b) True
23. 23.🧩 Which component boosts a small signal? (a) motor (b) transistor (c) LDR (d) resistor
24. 24.What does a transistor do? (a) limits the current (b) makes a beeping sound (c) smooths a wobbly supply (d) boosts a small signal
25. 25.True or false: a resistor limits the current. (a) False (b) True
26. 26.What does an LDR do? (a) has coloured bands (b) boosts a small signal (c) blows if current is high (d) senses how bright it is
27. 27.What does a capacitor do? (a) glows using little power (b) senses how bright it is (c) stores a little charge (d) senses how hot it is
28. 28.True or false: an LED glows using little power. (a) True (b) False
29. 29.🧩 Which component glows using little power? (a) fuse (b) diode (c) LED (d) potentiometer
30. 30.What does a resistor do? (a) makes a beeping sound (b) smooths a wobbly supply (c) has coloured bands (d) senses how bright it is
31. 31.True or false: a capacitor limits the current. (a) False (b) True
32. 32.🧩 Which component lets current go one way? (a) transistor (b) resistor (c) motor (d) diode
33. 33.True or false: an LED lets current go one way. (a) True (b) False
34. 34.True or false: a resistor has coloured bands. (a) True (b) False
35. 35.True or false: a buzzer beeps for an alarm. (a) True (b) False
36. 36.True or false: an LDR senses how bright it is. (a) False (b) True
37. 37.What does a potentiometer do? (a) turns a fan or wheels (b) blows if current is high (c) beeps for an alarm (d) is a resistance knob
38. 38.🧩 Which component has coloured bands? (a) potentiometer (b) transistor (c) motor (d) resistor
39. 39.What does a resistor do? (a) makes things spin (b) senses how bright it is (c) limits the current (d) stores a little charge
40. 40.True or false: a fuse boosts a small signal. (a) False (b) True

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