Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 605 · 40 questions

Remember (Test, then choose): Put the reading into the condition: true → the if part, false → the else part. > means strictly more and < strictly less; an equal reading makes them false. AND: both true. OR: at least one true. In a chain, the first true condition wins.

1. 1.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
   The distance sensor reads 31 cm. What happens? (a) buzzer is silent (b) buzzer beeps
2. 2.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
   The light reading is 580 and motion is detected (true). What happens? (a) porch lamp ON (b) porch lamp OFF
3. 3.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the else part (b) the if part (c) both parts (d) neither part
4. 4.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
   The light reading is 170 and motion is not detected (false). What happens? (a) porch lamp ON (b) porch lamp OFF
5. 5.🤖 if (light < 400) { lamp ON } else { lamp OFF }
   The light sensor reads 496. What happens? (a) lamp ON (b) lamp OFF
6. 6.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
   The light reading is 90 and motion is detected (true). What happens? (a) porch lamp ON (b) porch lamp OFF
7. 7.🤖 if (sound > 60) { red LED ON } else { green LED ON }
   The sound sensor reads 56. What happens? (a) red LED ON (b) green LED ON
8. 8.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
   The light reading is 80 and motion is not detected (false). What happens? (a) porch lamp ON (b) porch lamp OFF
9. 9.🤖 “if (A AND B)” is true when … (a) only B is true (b) only A is true (c) both A and B are true (d) both are false
10. 10.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown? (a) Cool (b) Warm (c) Hot
11. 11.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 170 and motion is not detected (false). What happens? (a) porch lamp ON (b) porch lamp OFF
12. 12.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 397. What happens? (a) lamp OFF (b) lamp ON
13. 13.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 45 °C. What is shown? (a) Hot (b) Cool (c) Warm
14. 14.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 400 and motion is detected (true). What happens? (a) porch lamp ON (b) porch lamp OFF
15. 15.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 40 °C. What is shown? (a) Warm (b) Cool (c) Hot
16. 16.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 41 °C. What is shown? (a) Cool (b) Hot (c) Warm
17. 17.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 40 °C. What is shown? (a) Warm (b) Cool (c) Hot
18. 18.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 522. What happens? (a) lamp OFF (b) lamp ON
19. 19.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 12 cm. What happens? (a) buzzer beeps (b) buzzer is silent
20. 20.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 160 and motion is detected (true). What happens? (a) porch lamp OFF (b) porch lamp ON
21. 21.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 600 and motion is detected (true). What happens? (a) porch lamp OFF (b) porch lamp ON
22. 22.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 620 and motion is detected (true). What happens? (a) porch lamp ON (b) porch lamp OFF
23. 23.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 35 cm. What happens? (a) buzzer beeps (b) buzzer is silent
24. 24.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 197. What happens? (a) lamp OFF (b) lamp ON
25. 25.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 510 and motion is detected (true). What happens? (a) porch lamp ON (b) porch lamp OFF
26. 26.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 62. What happens? (a) green LED ON (b) red LED ON
27. 27.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 41 °C. What is shown? (a) Cool (b) Warm (c) Hot
28. 28.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown? (a) Cool (b) Hot (c) Warm
29. 29.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 610 and motion is not detected (false). What happens? (a) porch lamp ON (b) porch lamp OFF
30. 30.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 12 cm. What happens? (a) buzzer is silent (b) buzzer beeps
31. 31.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown? (a) Hot (b) Warm (c) Cool
32. 32.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown? (a) Warm (b) Cool (c) Hot
33. 33.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 125. What happens? (a) lamp ON (b) lamp OFF
34. 34.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 38 °C. What is shown? (a) Hot (b) Cool (c) Warm
35. 35.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 150 and motion is not detected (false). What happens? (a) porch lamp OFF (b) porch lamp ON
36. 36.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 435. What happens? (a) lamp ON (b) lamp OFF
37. 37.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 85. What happens? (a) red LED ON (b) green LED ON
38. 38.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 330 and motion is detected (true). What happens? (a) porch lamp ON (b) porch lamp OFF
39. 39.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 27 cm. What happens? (a) buzzer beeps (b) buzzer is silent
40. 40.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 200 and motion is detected (true). What happens? (a) porch lamp ON (b) porch lamp OFF

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids