Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 174 · 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.What does a motor do? (a) is a resistance knob (b) makes a beeping sound (c) makes things spin (d) lets current go one way
2. 2.🧩 Which component has coloured bands? (a) LDR (b) thermistor (c) resistor (d) potentiometer
3. 3.🧩 Which component smooths a wobbly supply? (a) motor (b) fuse (c) capacitor (d) LDR
4. 4.🧩 Which component is a resistance knob? (a) diode (b) transistor (c) fuse (d) potentiometer
5. 5.🧩 Which component makes things spin? (a) fuse (b) capacitor (c) thermistor (d) motor
6. 6.True or false: a diode limits the current. (a) True (b) False
7. 7.True or false: a buzzer beeps for an alarm. (a) False (b) True
8. 8.🧩 A capacitor in a circuit can … (a) store charge briefly (b) make light (c) measure heat (d) spin a wheel
9. 9.What does a diode do? (a) limits the current (b) lets current go one way (c) has coloured bands (d) beeps for an alarm
10. 10.What does an LDR do? (a) blows if current is high (b) is a resistance knob (c) limits the current (d) senses how bright it is
11. 11.🧩 Which component beeps for an alarm? (a) buzzer (b) motor (c) resistor (d) LDR
12. 12.What does a capacitor do? (a) makes a beeping sound (b) smooths a wobbly supply (c) limits the current (d) glows using little power
13. 13.What does a resistor do? (a) glows using little power (b) senses how hot it is (c) stores a little charge (d) limits the current
14. 14.🧩 Which component turns a fan or wheels? (a) buzzer (b) LDR (c) resistor (d) motor
15. 15.🧩 Which part changes electrical energy into movement? (a) a resistor (b) an LED (c) a motor (d) a fuse
16. 16.True or false: a motor makes things spin. (a) False (b) True
17. 17.What does an LED do? (a) glows using little power (b) turns a fan or wheels (c) has coloured bands (d) stores a little charge
18. 18.True or false: a transistor boosts a small signal. (a) True (b) False
19. 19.True or false: a thermistor blows if current is high. (a) True (b) False
20. 20.True or false: a diode lets current go one way. (a) True (b) False
21. 21.🧩 Which part changes electrical energy into sound? (a) a buzzer (b) a diode (c) a resistor (d) a capacitor
22. 22.🧩 Which component boosts a small signal? (a) LDR (b) capacitor (c) diode (d) transistor
23. 23.What does a fuse do? (a) senses how bright it is (b) stores a little charge (c) glows using little power (d) blows if current is high
24. 24.True or false: an LED blows if current is high. (a) True (b) False
25. 25.What does a buzzer do? (a) makes things spin (b) boosts a small signal (c) senses how bright it is (d) beeps for an alarm
26. 26.True or false: a diode senses how bright it is. (a) True (b) False
27. 27.🧩 Which component limits the current? (a) diode (b) LDR (c) buzzer (d) resistor
28. 28.🧩 Which component senses how bright it is? (a) motor (b) capacitor (c) LDR (d) transistor
29. 29.True or false: an LDR senses how bright it is. (a) True (b) False
30. 30.🧩 Which component senses how hot it is? (a) capacitor (b) thermistor (c) resistor (d) transistor
31. 31.What does a transistor do? (a) boosts a small signal (b) stores a little charge (c) is a resistance knob (d) blows if current is high
32. 32.True or false: a capacitor turns a fan or wheels. (a) True (b) False
33. 33.True or false: a resistor limits the current. (a) True (b) False
34. 34.🧩 Which component blows if current is high? (a) fuse (b) thermistor (c) potentiometer (d) diode
35. 35.What does a potentiometer do? (a) limits the current (b) blows if current is high (c) makes things spin (d) is a resistance knob
36. 36.What does a capacitor do? (a) beeps for an alarm (b) has coloured bands (c) lets current go one way (d) stores a little charge
37. 37.True or false: a buzzer makes a beeping sound. (a) False (b) True
38. 38.What does a motor do? (a) stores a little charge (b) senses how bright it is (c) turns a fan or wheels (d) makes a beeping sound
39. 39.🧩 Which component lets current go one way? (a) diode (b) LDR (c) transistor (d) resistor
40. 40.True or false: an LED has coloured bands. (a) True (b) False

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