Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 24 · 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 (temperature > 25) { fan ON } else { fan OFF }
   The temperature sensor reads 30 °C. What happens? (a) fan ON (b) fan OFF
2. 2.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
   The temperature is 19 °C. What is shown? (a) Warm (b) Cool (c) Hot
3. 3.🤖 if (sound > 70) { red LED ON } else { green LED ON }
   The sound sensor reads 63. What happens? (a) red LED ON (b) green LED ON
4. 4.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
   The temperature is 32 °C. What is shown? (a) Warm (b) Hot (c) Cool
5. 5.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
   The light reading is 300 and motion is detected (true). What happens? (a) porch lamp ON (b) porch lamp OFF
6. 6.🤖 if (light < 500) { lamp ON } else { lamp OFF }
   The light sensor reads 577. What happens? (a) lamp OFF (b) lamp ON
7. 7.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
   The temperature is 39 °C. What is shown? (a) Hot (b) Warm (c) Cool
8. 8.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
   The temperature is 23 °C. What is shown? (a) Hot (b) Warm (c) Cool
9. 9.🤖 “if (A AND B)” is true when … (a) both A and B are true (b) only A is true (c) only B is true (d) both are false
10. 10.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 73. What happens? (a) red LED ON (b) green LED ON
11. 11.🤖 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 ON (b) porch lamp OFF
12. 12.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 42 °C. What is shown? (a) Cool (b) Hot (c) Warm
13. 13.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 45. What happens? (a) red LED ON (b) green LED ON
14. 14.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) neither part (b) the if part (c) both parts (d) the else part
15. 15.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 196. What happens? (a) lamp ON (b) lamp OFF
16. 16.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 47 %. What happens? (a) pump OFF (b) pump ON
17. 17.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 44 °C. What is shown? (a) Hot (b) Warm (c) Cool
18. 18.🤖 if (light < 400 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
19. 19.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 170. What happens? (a) lamp OFF (b) lamp ON
20. 20.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 35 °C. What happens? (a) fan OFF (b) fan ON
21. 21.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 29 cm. What happens? (a) buzzer is silent (b) buzzer beeps
22. 22.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 180 and motion is not detected (false). What happens? (a) porch lamp ON (b) porch lamp OFF
23. 23.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 41 °C. What is shown? (a) Hot (b) Cool (c) Warm
24. 24.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 23 cm. What happens? (a) buzzer is silent (b) buzzer beeps
25. 25.🤖 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
26. 26.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 60 and motion is detected (true). What happens? (a) porch lamp ON (b) porch lamp OFF
27. 27.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 12 cm. What happens? (a) buzzer beeps (b) buzzer is silent
28. 28.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown? (a) Hot (b) Cool (c) Warm
29. 29.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 320 and motion is not detected (false). What happens? (a) porch lamp ON (b) porch lamp OFF
30. 30.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 640 and motion is not detected (false). What happens? (a) porch lamp OFF (b) porch lamp ON
31. 31.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 150 and motion is detected (true). What happens? (a) porch lamp OFF (b) porch lamp ON
32. 32.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 630 and motion is detected (true). What happens? (a) porch lamp OFF (b) porch lamp ON
33. 33.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown? (a) Warm (b) Cool (c) Hot
34. 34.🤖 if (light < 200 AND 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
35. 35.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 38 %. What happens? (a) pump OFF (b) pump ON
36. 36.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 41 °C. What is shown? (a) Warm (b) Cool (c) Hot
37. 37.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 19 °C. What happens? (a) fan ON (b) fan OFF
38. 38.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 37 °C. What is shown? (a) Hot (b) Cool (c) Warm
39. 39.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 62 %. What happens? (a) pump ON (b) pump OFF
40. 40.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 23 °C. What happens? (a) fan ON (b) fan OFF

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