Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 570 · 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) buzzer (b) potentiometer (c) fuse (d) transistor
2. 2.🧩 Which component turns a fan or wheels? (a) motor (b) fuse (c) thermistor (d) LDR
3. 3.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a buzzer (d) a diode
4. 4.What does a potentiometer do? (a) turns a fan or wheels (b) glows using little power (c) is a resistance knob (d) stores a little charge
5. 5.🧩 Which component makes things spin? (a) diode (b) motor (c) LED (d) resistor
6. 6.True or false: a motor turns a fan or wheels. (a) True (b) False
7. 7.What does a capacitor do? (a) is a resistance knob (b) beeps for an alarm (c) smooths a wobbly supply (d) has coloured bands
8. 8.True or false: a resistor turns a fan or wheels. (a) True (b) False
9. 9.🧩 Which component senses how bright it is? (a) buzzer (b) diode (c) thermistor (d) LDR
10. 10.🧩 Which component limits the current? (a) fuse (b) buzzer (c) resistor (d) LDR
11. 11.What does a fuse do? (a) senses how bright it is (b) is a resistance knob (c) smooths a wobbly supply (d) blows if current is high
12. 12.🧩 Which part changes electrical energy into movement? (a) a fuse (b) a motor (c) a resistor (d) an LED
13. 13.🧩 A capacitor in a circuit can … (a) measure heat (b) store charge briefly (c) make light (d) spin a wheel
14. 14.True or false: a buzzer makes a beeping sound. (a) False (b) True
15. 15.True or false: a resistor makes things spin. (a) False (b) True
16. 16.🧩 Which component glows using little power? (a) potentiometer (b) fuse (c) transistor (d) LED
17. 17.What does a buzzer do? (a) makes things spin (b) makes a beeping sound (c) glows using little power (d) limits the current
18. 18.True or false: a resistor limits the current. (a) False (b) True
19. 19.🧩 Which component lets current go one way? (a) thermistor (b) diode (c) motor (d) transistor
20. 20.🧩 Which component stores a little charge? (a) buzzer (b) capacitor (c) motor (d) LED
21. 21.What does a thermistor do? (a) blows if current is high (b) senses how hot it is (c) turns a fan or wheels (d) has coloured bands
22. 22.🧩 Which component makes a beeping sound? (a) capacitor (b) buzzer (c) LED (d) potentiometer
23. 23.What does a resistor do? (a) lets current go one way (b) limits the current (c) senses how bright it is (d) stores a little charge
24. 24.True or false: a motor blows if current is high. (a) False (b) True
25. 25.True or false: a fuse beeps for an alarm. (a) True (b) False
26. 26.What does a transistor do? (a) glows using little power (b) boosts a small signal (c) makes a beeping sound (d) is a resistance knob
27. 27.🧩 Which component smooths a wobbly supply? (a) capacitor (b) motor (c) potentiometer (d) LED
28. 28.What does a capacitor do? (a) senses how bright it is (b) is a resistance knob (c) limits the current (d) stores a little charge
29. 29.What does a motor do? (a) has coloured bands (b) turns a fan or wheels (c) stores a little charge (d) blows if current is high
30. 30.What does an LED do? (a) glows using little power (b) boosts a small signal (c) is a resistance knob (d) has coloured bands
31. 31.True or false: an LED smooths a wobbly supply. (a) True (b) False
32. 32.What does a diode do? (a) blows if current is high (b) makes things spin (c) is a resistance knob (d) lets current go one way
33. 33.True or false: an LDR limits the current. (a) False (b) True
34. 34.True or false: a potentiometer makes a beeping sound. (a) True (b) False
35. 35.🧩 Which component boosts a small signal? (a) LDR (b) transistor (c) capacitor (d) diode
36. 36.What does a buzzer do? (a) beeps for an alarm (b) blows if current is high (c) limits the current (d) makes things spin
37. 37.True or false: a motor boosts a small signal. (a) False (b) True
38. 38.True or false: a resistor has coloured bands. (a) False (b) True
39. 39.True or false: a transistor makes things spin. (a) False (b) True
40. 40.True or false: a capacitor stores a little charge. (a) False (b) True

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