Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 990 · 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 < 10) { buzzer beeps } else { buzzer is silent }
   The distance sensor reads 4 cm. What happens? (a) buzzer beeps (b) buzzer is silent
2. 2.🤖 if (moisture < 50) { pump ON } else { pump OFF }
   The soil moisture sensor reads 59 %. What happens? (a) pump ON (b) pump OFF
3. 3.🤖 if (moisture < 30) { pump ON } else { pump OFF }
   The soil moisture sensor reads 45 %. What happens? (a) pump ON (b) pump OFF
4. 4.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the else part (b) the if part (c) neither part (d) both parts
5. 5.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
   The temperature is 40 °C. What is shown? (a) Cool (b) Hot (c) Warm
6. 6.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
   The temperature is 24 °C. What is shown? (a) Warm (b) Cool (c) Hot
7. 7.🤖 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
8. 8.🤖 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
9. 9.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
   The temperature is 15 °C. What is shown? (a) Warm (b) Hot (c) Cool
10. 10.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 380 and motion is detected (true). What happens? (a) porch lamp ON (b) porch lamp OFF
11. 11.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown? (a) Cool (b) Warm (c) Hot
12. 12.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 410 and motion is not detected (false). What happens? (a) porch lamp OFF (b) porch lamp ON
13. 13.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 196. What happens? (a) lamp ON (b) lamp OFF
14. 14.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 21 %. What happens? (a) pump ON (b) pump OFF
15. 15.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 24 cm. What happens? (a) buzzer is silent (b) buzzer beeps
16. 16.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 43 °C. What is shown? (a) Cool (b) Warm (c) Hot
17. 17.🤖 “if (A AND B)” is true when … (a) both are false (b) only B is true (c) only A is true (d) both A and B are true
18. 18.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 5 cm. What happens? (a) buzzer is silent (b) buzzer beeps
19. 19.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 38 °C. What happens? (a) fan ON (b) fan OFF
20. 20.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 27 %. What happens? (a) pump ON (b) pump OFF
21. 21.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 19 °C. What happens? (a) fan ON (b) fan OFF
22. 22.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 23 °C. What happens? (a) fan ON (b) fan OFF
23. 23.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 19 %. What happens? (a) pump ON (b) pump OFF
24. 24.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 65. What happens? (a) green LED ON (b) red LED ON
25. 25.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown? (a) Warm (b) Cool (c) Hot
26. 26.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 39 %. What happens? (a) pump ON (b) pump OFF
27. 27.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 43 °C. What is shown? (a) Cool (b) Warm (c) Hot
28. 28.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown? (a) Cool (b) Warm (c) Hot
29. 29.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 88. What happens? (a) green LED ON (b) red LED ON
30. 30.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown? (a) Warm (b) Cool (c) Hot
31. 31.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 21 %. What happens? (a) pump OFF (b) pump ON
32. 32.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown? (a) Warm (b) Cool (c) Hot
33. 33.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 360. What happens? (a) lamp ON (b) lamp OFF
34. 34.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 220 and motion is detected (true). What happens? (a) porch lamp ON (b) porch lamp OFF
35. 35.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown? (a) Cool (b) Hot (c) Warm
36. 36.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 130 and motion is detected (true). What happens? (a) porch lamp ON (b) porch lamp OFF
37. 37.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 570 and motion is detected (true). What happens? (a) porch lamp ON (b) porch lamp OFF
38. 38.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 67. What happens? (a) green LED ON (b) red LED ON
39. 39.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 640 and motion is detected (true). What happens? (a) porch lamp OFF (b) porch lamp ON
40. 40.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown? (a) Hot (b) Warm (c) Cool

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