Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 520 · 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 < 20) { buzzer beeps } else { buzzer is silent }
   The distance sensor reads 27 cm. What happens? (a) buzzer beeps (b) buzzer is silent
2. 2.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) both parts (b) neither part (c) the else part (d) the if part
3. 3.🤖 if (moisture < 30) { pump ON } else { pump OFF }
   The soil moisture sensor reads 40 %. What happens? (a) pump ON (b) pump OFF
4. 4.🤖 if (light < 200) { lamp ON } else { lamp OFF }
   The light sensor reads 276. What happens? (a) lamp ON (b) lamp OFF
5. 5.🤖 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 OFF (b) porch lamp ON
6. 6.🤖 “if (A AND B)” is true when … (a) only B is true (b) both are false (c) only A is true (d) both A and B are true
7. 7.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
   The temperature is 11 °C. What is shown? (a) Warm (b) Hot (c) Cool
8. 8.🤖 if (sound > 60) { red LED ON } else { green LED ON }
   The sound sensor reads 49. What happens? (a) red LED ON (b) green LED ON
9. 9.🤖 if (sound > 60) { red LED ON } else { green LED ON }
   The sound sensor reads 57. What happens? (a) red LED ON (b) green LED ON
10. 10.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 330 and motion is not detected (false). What happens? (a) porch lamp ON (b) porch lamp OFF
11. 11.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 28 °C. What is shown? (a) Cool (b) Hot (c) Warm
12. 12.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown? (a) Cool (b) Hot (c) Warm
13. 13.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 420 and motion is detected (true). What happens? (a) porch lamp ON (b) porch lamp OFF
14. 14.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 430 and motion is detected (true). What happens? (a) porch lamp OFF (b) porch lamp ON
15. 15.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 22 %. What happens? (a) pump ON (b) pump OFF
16. 16.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 130 and motion is not detected (false). What happens? (a) porch lamp OFF (b) porch lamp ON
17. 17.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 337. What happens? (a) lamp OFF (b) lamp ON
18. 18.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 13 cm. What happens? (a) buzzer is silent (b) buzzer beeps
19. 19.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 38 °C. What happens? (a) fan ON (b) fan OFF
20. 20.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 150 and motion is not detected (false). What happens? (a) porch lamp ON (b) porch lamp OFF
21. 21.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 40 %. What happens? (a) pump ON (b) pump OFF
22. 22.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 41 %. What happens? (a) pump ON (b) pump OFF
23. 23.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 32 cm. What happens? (a) buzzer is silent (b) buzzer beeps
24. 24.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 620 and motion is detected (true). What happens? (a) porch lamp OFF (b) porch lamp ON
25. 25.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 520 and motion is not detected (false). What happens? (a) porch lamp OFF (b) porch lamp ON
26. 26.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 28 °C. What is shown? (a) Hot (b) Warm (c) Cool
27. 27.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 11 cm. What happens? (a) buzzer is silent (b) buzzer beeps
28. 28.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 36 %. What happens? (a) pump ON (b) pump OFF
29. 29.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 273. What happens? (a) lamp OFF (b) lamp ON
30. 30.🤖 if (temperature > 37) { 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
31. 31.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 42 °C. What is shown? (a) Warm (b) Cool (c) Hot
32. 32.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown? (a) Warm (b) Cool (c) Hot
33. 33.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 500 and motion is detected (true). What happens? (a) porch lamp ON (b) porch lamp OFF
34. 34.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 30 °C. What is shown? (a) Warm (b) Cool (c) Hot
35. 35.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 190 and motion is not detected (false). What happens? (a) porch lamp OFF (b) porch lamp ON
36. 36.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown? (a) Hot (b) Warm (c) Cool
37. 37.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 37 °C. What happens? (a) fan ON (b) fan OFF
38. 38.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 26 °C. What happens? (a) fan OFF (b) fan ON
39. 39.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown? (a) Hot (b) Cool (c) Warm
40. 40.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 500 and motion is not detected (false). What happens? (a) porch lamp OFF (b) porch lamp ON

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