Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 133 · 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 37 cm. What happens? (a) buzzer beeps (b) buzzer is silent
2. 2.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) neither part (b) both parts (c) the if part (d) the else part
3. 3.🤖 if (light < 200 AND 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
4. 4.🤖 “if (A AND B)” is true when … (a) only B is true (b) both are false (c) both A and B are true (d) only A is true
5. 5.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
   The light reading is 60 and motion is detected (true). What happens? (a) porch lamp OFF (b) porch lamp ON
6. 6.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
   The light reading is 490 and motion is not detected (false). What happens? (a) porch lamp OFF (b) porch lamp ON
7. 7.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
   The light reading is 350 and motion is detected (true). What happens? (a) porch lamp ON (b) porch lamp OFF
8. 8.🤖 if (temperature > 30) { fan ON } else { fan OFF }
   The temperature sensor reads 35 °C. What happens? (a) fan ON (b) fan OFF
9. 9.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
   The temperature is 33 °C. What is shown? (a) Cool (b) Hot (c) Warm
10. 10.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 220 and motion is not detected (false). What happens? (a) porch lamp ON (b) porch lamp OFF
11. 11.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 68. What happens? (a) red LED ON (b) green LED ON
12. 12.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 26 °C. What is shown? (a) Warm (b) Hot (c) Cool
13. 13.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 270 and motion is detected (true). What happens? (a) porch lamp OFF (b) porch lamp ON
14. 14.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown? (a) Warm (b) Cool (c) Hot
15. 15.🤖 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
16. 16.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 60 and motion is not detected (false). What happens? (a) porch lamp ON (b) porch lamp OFF
17. 17.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 87. What happens? (a) green LED ON (b) red LED ON
18. 18.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 20 %. What happens? (a) pump OFF (b) pump ON
19. 19.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown? (a) Hot (b) Warm (c) Cool
20. 20.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown? (a) Warm (b) Hot (c) Cool
21. 21.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 70. What happens? (a) green LED ON (b) red LED ON
22. 22.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 560 and motion is not detected (false). What happens? (a) porch lamp ON (b) porch lamp OFF
23. 23.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 33 °C. What happens? (a) fan OFF (b) fan ON
24. 24.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown? (a) Hot (b) Warm (c) Cool
25. 25.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 300 and motion is detected (true). What happens? (a) porch lamp OFF (b) porch lamp ON
26. 26.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown? (a) Warm (b) Hot (c) Cool
27. 27.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 180 and motion is detected (true). What happens? (a) porch lamp OFF (b) porch lamp ON
28. 28.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 42 °C. What is shown? (a) Warm (b) Cool (c) Hot
29. 29.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 285. What happens? (a) lamp OFF (b) lamp ON
30. 30.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 50 and motion is not detected (false). What happens? (a) porch lamp ON (b) porch lamp OFF
31. 31.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 650 and motion is not detected (false). What happens? (a) porch lamp OFF (b) porch lamp ON
32. 32.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown? (a) Hot (b) Warm (c) Cool
33. 33.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 44 °C. What is shown? (a) Warm (b) Hot (c) Cool
34. 34.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 218. What happens? (a) lamp OFF (b) lamp ON
35. 35.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown? (a) Cool (b) Warm (c) Hot
36. 36.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 38 °C. What is shown? (a) Warm (b) Hot (c) Cool
37. 37.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 140 and motion is detected (true). What happens? (a) porch lamp ON (b) porch lamp OFF
38. 38.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 75. What happens? (a) red LED ON (b) green LED ON
39. 39.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown? (a) Hot (b) Warm (c) Cool
40. 40.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown? (a) Cool (b) Warm (c) Hot

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