Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 413 · 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 resistor beeps for an alarm. (a) False (b) True
2. 2.What does a buzzer do? (a) makes a beeping sound (b) has coloured bands (c) smooths a wobbly supply (d) blows if current is high
3. 3.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a motor (d) a fuse
4. 4.True or false: a diode makes things spin. (a) False (b) True
5. 5.🧩 Which component blows if current is high? (a) diode (b) fuse (c) resistor (d) LED
6. 6.🧩 Which component senses how bright it is? (a) diode (b) fuse (c) LDR (d) potentiometer
7. 7.True or false: a transistor senses how bright it is. (a) False (b) True
8. 8.🧩 Which component is a resistance knob? (a) potentiometer (b) LDR (c) buzzer (d) capacitor
9. 9.🧩 Which component makes things spin? (a) diode (b) motor (c) fuse (d) potentiometer
10. 10.True or false: a diode lets current go one way. (a) False (b) True
11. 11.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a buzzer (c) a resistor (d) a diode
12. 12.What does an LED do? (a) lets current go one way (b) limits the current (c) stores a little charge (d) glows using little power
13. 13.True or false: a potentiometer senses how hot it is. (a) False (b) True
14. 14.🧩 Which component limits the current? (a) capacitor (b) resistor (c) potentiometer (d) motor
15. 15.🧩 Which component turns a fan or wheels? (a) potentiometer (b) thermistor (c) motor (d) resistor
16. 16.What does a thermistor do? (a) glows using little power (b) limits the current (c) stores a little charge (d) senses how hot it is
17. 17.What does a buzzer do? (a) beeps for an alarm (b) smooths a wobbly supply (c) boosts a small signal (d) glows using little power
18. 18.🧩 A capacitor in a circuit can … (a) measure heat (b) make light (c) store charge briefly (d) spin a wheel
19. 19.True or false: a transistor blows if current is high. (a) True (b) False
20. 20.True or false: an LDR stores a little charge. (a) True (b) False
21. 21.True or false: a resistor boosts a small signal. (a) False (b) True
22. 22.True or false: an LED makes a beeping sound. (a) True (b) False
23. 23.🧩 Which component senses how hot it is? (a) fuse (b) potentiometer (c) LED (d) thermistor
24. 24.True or false: a resistor has coloured bands. (a) True (b) False
25. 25.🧩 Which component has coloured bands? (a) resistor (b) diode (c) transistor (d) capacitor
26. 26.🧩 Which component lets current go one way? (a) capacitor (b) fuse (c) diode (d) potentiometer
27. 27.What does a fuse do? (a) boosts a small signal (b) beeps for an alarm (c) turns a fan or wheels (d) blows if current is high
28. 28.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
29. 29.True or false: a capacitor senses how bright it is. (a) True (b) False
30. 30.What does a motor do? (a) makes things spin (b) smooths a wobbly supply (c) blows if current is high (d) limits the current
31. 31.🧩 Which component smooths a wobbly supply? (a) capacitor (b) buzzer (c) motor (d) resistor
32. 32.True or false: an LED stores a little charge. (a) False (b) True
33. 33.What does a potentiometer do? (a) has coloured bands (b) is a resistance knob (c) smooths a wobbly supply (d) turns a fan or wheels
34. 34.What does a motor do? (a) is a resistance knob (b) senses how bright it is (c) turns a fan or wheels (d) smooths a wobbly supply
35. 35.What does an LDR do? (a) senses how bright it is (b) has coloured bands (c) makes a beeping sound (d) senses how hot it is
36. 36.🧩 Which component stores a little charge? (a) fuse (b) resistor (c) capacitor (d) diode
37. 37.True or false: a fuse turns a fan or wheels. (a) True (b) False
38. 38.True or false: a transistor boosts a small signal. (a) True (b) False
39. 39.What does a resistor do? (a) makes a beeping sound (b) boosts a small signal (c) limits the current (d) senses how hot it is
40. 40.True or false: a buzzer makes things spin. (a) False (b) True

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