Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 217 · 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 turns a fan or wheels? (a) potentiometer (b) LDR (c) motor (d) capacitor
2. 2.True or false: a resistor limits the current. (a) False (b) True
3. 3.🧩 Which component makes things spin? (a) capacitor (b) motor (c) LDR (d) fuse
4. 4.🧩 Which part changes electrical energy into movement? (a) a motor (b) an LED (c) a fuse (d) a resistor
5. 5.True or false: an LDR is a resistance knob. (a) False (b) True
6. 6.What does a diode do? (a) lets current go one way (b) has coloured bands (c) blows if current is high (d) turns a fan or wheels
7. 7.🧩 Which component smooths a wobbly supply? (a) buzzer (b) capacitor (c) transistor (d) fuse
8. 8.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a capacitor (d) a resistor
9. 9.🧩 Which component senses how bright it is? (a) resistor (b) fuse (c) LDR (d) buzzer
10. 10.What does a buzzer do? (a) smooths a wobbly supply (b) turns a fan or wheels (c) stores a little charge (d) beeps for an alarm
11. 11.🧩 Which component has coloured bands? (a) fuse (b) capacitor (c) motor (d) resistor
12. 12.True or false: an LED glows using little power. (a) True (b) False
13. 13.What does a fuse do? (a) senses how hot it is (b) makes a beeping sound (c) blows if current is high (d) lets current go one way
14. 14.What does a buzzer do? (a) makes things spin (b) boosts a small signal (c) senses how hot it is (d) makes a beeping sound
15. 15.What does a motor do? (a) lets current go one way (b) stores a little charge (c) turns a fan or wheels (d) blows if current is high
16. 16.True or false: a potentiometer blows if current is high. (a) False (b) True
17. 17.True or false: a transistor beeps for an alarm. (a) False (b) True
18. 18.What does a capacitor do? (a) boosts a small signal (b) has coloured bands (c) glows using little power (d) stores a little charge
19. 19.🧩 Which component stores a little charge? (a) LED (b) diode (c) resistor (d) capacitor
20. 20.True or false: a resistor makes things spin. (a) False (b) True
21. 21.🧩 Which component lets current go one way? (a) diode (b) LDR (c) buzzer (d) resistor
22. 22.🧩 Which component beeps for an alarm? (a) resistor (b) motor (c) buzzer (d) transistor
23. 23.🧩 Which component limits the current? (a) motor (b) potentiometer (c) resistor (d) fuse
24. 24.🧩 Which component makes a beeping sound? (a) transistor (b) buzzer (c) resistor (d) diode
25. 25.What does an LED do? (a) boosts a small signal (b) glows using little power (c) beeps for an alarm (d) blows if current is high
26. 26.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
27. 27.True or false: a resistor has coloured bands. (a) False (b) True
28. 28.🧩 Which component glows using little power? (a) diode (b) resistor (c) potentiometer (d) LED
29. 29.True or false: a capacitor has coloured bands. (a) True (b) False
30. 30.True or false: a diode makes things spin. (a) True (b) False
31. 31.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) make light (d) store charge briefly
32. 32.True or false: a potentiometer lets current go one way. (a) False (b) True
33. 33.True or false: a motor smooths a wobbly supply. (a) True (b) False
34. 34.What does a transistor do? (a) blows if current is high (b) stores a little charge (c) boosts a small signal (d) makes things spin
35. 35.What does a potentiometer do? (a) lets current go one way (b) senses how hot it is (c) is a resistance knob (d) limits the current
36. 36.True or false: a motor blows if current is high. (a) True (b) False
37. 37.What does a resistor do? (a) is a resistance knob (b) glows using little power (c) limits the current (d) stores a little charge
38. 38.What does an LDR do? (a) smooths a wobbly supply (b) senses how bright it is (c) stores a little charge (d) boosts a small signal
39. 39.True or false: a thermistor beeps for an alarm. (a) True (b) False
40. 40.🧩 Which component boosts a small signal? (a) transistor (b) potentiometer (c) fuse (d) diode

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