Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 561 · 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 (A AND B)” is true when … (a) only A is true (b) both are false (c) only B is true (d) both A and B are true
2. 2.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
   The temperature is 39 °C. What is shown? (a) Hot (b) Cool (c) Warm
3. 3.🤖 if (moisture < 50) { pump ON } else { pump OFF }
   The soil moisture sensor reads 33 %. What happens? (a) pump ON (b) pump OFF
4. 4.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
   The temperature is 21 °C. What is shown? (a) Warm (b) Hot (c) Cool
5. 5.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) neither part (b) both parts (c) the else part (d) the if part
6. 6.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
   The temperature is 17 °C. What is shown? (a) Warm (b) Hot (c) Cool
7. 7.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
   The distance sensor reads 31 cm. What happens? (a) buzzer is silent (b) buzzer beeps
8. 8.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
   The light reading is 430 and motion is not detected (false). What happens? (a) porch lamp ON (b) porch lamp OFF
9. 9.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
   The light reading is 360 and motion is not detected (false). What happens? (a) porch lamp OFF (b) porch lamp ON
10. 10.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 19 cm. What happens? (a) buzzer is silent (b) buzzer beeps
11. 11.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 33 °C. What happens? (a) fan OFF (b) fan ON
12. 12.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 27 °C. What happens? (a) fan OFF (b) fan ON
13. 13.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 640 and motion is detected (true). What happens? (a) porch lamp ON (b) porch lamp OFF
14. 14.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 51 %. What happens? (a) pump OFF (b) pump ON
15. 15.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 13 %. What happens? (a) pump ON (b) pump OFF
16. 16.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 21 °C. What happens? (a) fan OFF (b) fan ON
17. 17.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 26 °C. What happens? (a) fan OFF (b) fan ON
18. 18.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 590 and motion is detected (true). What happens? (a) porch lamp OFF (b) porch lamp ON
19. 19.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown? (a) Cool (b) Warm (c) Hot
20. 20.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 370 and motion is not detected (false). What happens? (a) porch lamp OFF (b) porch lamp ON
21. 21.🤖 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
22. 22.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 140 and motion is not detected (false). What happens? (a) porch lamp OFF (b) porch lamp ON
23. 23.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 450 and motion is detected (true). What happens? (a) porch lamp OFF (b) porch lamp ON
24. 24.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 57 %. What happens? (a) pump OFF (b) pump ON
25. 25.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown? (a) Hot (b) Warm (c) Cool
26. 26.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 34 °C. What happens? (a) fan OFF (b) fan ON
27. 27.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 93. What happens? (a) red LED ON (b) green LED ON
28. 28.🤖 if (light < 300 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
29. 29.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown? (a) Hot (b) Warm (c) Cool
30. 30.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 8 cm. What happens? (a) buzzer is silent (b) buzzer beeps
31. 31.🤖 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 OFF (b) porch lamp ON
32. 32.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 310 and motion is not detected (false). What happens? (a) porch lamp OFF (b) porch lamp ON
33. 33.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 490 and motion is not detected (false). What happens? (a) porch lamp ON (b) porch lamp OFF
34. 34.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 58. What happens? (a) red LED ON (b) green LED ON
35. 35.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown? (a) Warm (b) Hot (c) Cool
36. 36.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 254. What happens? (a) lamp ON (b) lamp OFF
37. 37.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 320 and motion is detected (true). What happens? (a) porch lamp OFF (b) porch lamp ON
38. 38.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 27 °C. What happens? (a) fan OFF (b) fan ON
39. 39.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown? (a) Cool (b) Warm (c) Hot
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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