Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 375 · 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 limits the current? (a) capacitor (b) resistor (c) buzzer (d) thermistor
2. 2.What does a transistor do? (a) smooths a wobbly supply (b) blows if current is high (c) boosts a small signal (d) has coloured bands
3. 3.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) an LED (d) a resistor
4. 4.True or false: a resistor has coloured bands. (a) False (b) True
5. 5.True or false: a buzzer makes a beeping sound. (a) True (b) False
6. 6.🧩 Which component stores a little charge? (a) capacitor (b) fuse (c) thermistor (d) diode
7. 7.🧩 Which part changes electrical energy into sound? (a) a diode (b) a capacitor (c) a buzzer (d) a resistor
8. 8.🧩 Which component lets current go one way? (a) potentiometer (b) LDR (c) buzzer (d) diode
9. 9.True or false: a thermistor turns a fan or wheels. (a) True (b) False
10. 10.🧩 Which component senses how hot it is? (a) LDR (b) resistor (c) thermistor (d) motor
11. 11.True or false: a thermistor limits the current. (a) True (b) False
12. 12.What does a resistor do? (a) limits the current (b) makes things spin (c) makes a beeping sound (d) beeps for an alarm
13. 13.What does a diode do? (a) is a resistance knob (b) boosts a small signal (c) lets current go one way (d) beeps for an alarm
14. 14.True or false: a buzzer lets current go one way. (a) True (b) False
15. 15.🧩 Which component smooths a wobbly supply? (a) LED (b) fuse (c) LDR (d) capacitor
16. 16.True or false: a motor boosts a small signal. (a) False (b) True
17. 17.What does a thermistor do? (a) senses how hot it is (b) lets current go one way (c) beeps for an alarm (d) boosts a small signal
18. 18.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) store charge briefly (d) measure heat
19. 19.True or false: a thermistor has coloured bands. (a) False (b) True
20. 20.🧩 Which component glows using little power? (a) capacitor (b) LED (c) transistor (d) fuse
21. 21.What does an LED do? (a) stores a little charge (b) is a resistance knob (c) glows using little power (d) makes things spin
22. 22.🧩 Which component makes a beeping sound? (a) potentiometer (b) buzzer (c) LED (d) motor
23. 23.What does a motor do? (a) makes things spin (b) glows using little power (c) senses how hot it is (d) stores a little charge
24. 24.True or false: an LED blows if current is high. (a) True (b) False
25. 25.🧩 Which component blows if current is high? (a) buzzer (b) capacitor (c) fuse (d) thermistor
26. 26.🧩 Which component turns a fan or wheels? (a) diode (b) potentiometer (c) motor (d) capacitor
27. 27.True or false: a resistor is a resistance knob. (a) True (b) False
28. 28.True or false: an LDR beeps for an alarm. (a) False (b) True
29. 29.What does an LDR do? (a) has coloured bands (b) senses how hot it is (c) senses how bright it is (d) lets current go one way
30. 30.What does a motor do? (a) turns a fan or wheels (b) lets current go one way (c) limits the current (d) stores a little charge
31. 31.🧩 Which component has coloured bands? (a) resistor (b) LDR (c) thermistor (d) potentiometer
32. 32.What does a potentiometer do? (a) has coloured bands (b) boosts a small signal (c) turns a fan or wheels (d) is a resistance knob
33. 33.🧩 Which component is a resistance knob? (a) LED (b) potentiometer (c) transistor (d) LDR
34. 34.True or false: a thermistor stores a little charge. (a) False (b) True
35. 35.🧩 Which component beeps for an alarm? (a) LDR (b) buzzer (c) thermistor (d) LED
36. 36.True or false: a motor makes things spin. (a) False (b) True
37. 37.What does a resistor do? (a) glows using little power (b) is a resistance knob (c) has coloured bands (d) smooths a wobbly supply
38. 38.🧩 Which component senses how bright it is? (a) LED (b) buzzer (c) LDR (d) diode
39. 39.True or false: a buzzer stores a little charge. (a) True (b) False
40. 40.True or false: a fuse blows if current is high. (a) False (b) True

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