Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 940 · 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 31 cm. What happens? (a) buzzer beeps (b) buzzer is silent
2. 2.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
   The temperature is 25 °C. What is shown? (a) Warm (b) Hot (c) Cool
3. 3.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the else part (b) both parts (c) the if part (d) neither part
4. 4.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
   The temperature is 35 °C. What is shown? (a) Hot (b) Warm (c) Cool
5. 5.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
   The temperature is 23 °C. What is shown? (a) Warm (b) Hot (c) Cool
6. 6.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
   The temperature is 25 °C. What is shown? (a) Hot (b) Warm (c) Cool
7. 7.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
   The light reading is 300 and motion is not detected (false). What happens? (a) porch lamp ON (b) porch lamp OFF
8. 8.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
   The light reading is 190 and motion is detected (true). What happens? (a) porch lamp ON (b) porch lamp OFF
9. 9.🤖 if (moisture < 50) { pump ON } else { pump OFF }
   The soil moisture sensor reads 62 %. What happens? (a) pump OFF (b) pump ON
10. 10.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown? (a) Hot (b) Cool (c) Warm
11. 11.🤖 “if (A AND B)” is true when … (a) only B is true (b) only A is true (c) both A and B are true (d) both are false
12. 12.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 90 and motion is detected (true). What happens? (a) porch lamp ON (b) porch lamp OFF
13. 13.🤖 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 ON (b) porch lamp OFF
14. 14.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown? (a) Cool (b) Warm (c) Hot
15. 15.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 550 and motion is detected (true). What happens? (a) porch lamp OFF (b) porch lamp ON
16. 16.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 530 and motion is not detected (false). What happens? (a) porch lamp ON (b) porch lamp OFF
17. 17.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 290 and motion is not detected (false). What happens? (a) porch lamp ON (b) porch lamp OFF
18. 18.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 8 cm. What happens? (a) buzzer is silent (b) buzzer beeps
19. 19.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 87. What happens? (a) red LED ON (b) green LED ON
20. 20.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 27 %. What happens? (a) pump OFF (b) pump ON
21. 21.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 22 cm. What happens? (a) buzzer is silent (b) buzzer beeps
22. 22.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 179. What happens? (a) lamp OFF (b) lamp ON
23. 23.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown? (a) Cool (b) Hot (c) Warm
24. 24.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 31 %. What happens? (a) pump OFF (b) pump ON
25. 25.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 28 °C. What is shown? (a) Hot (b) Cool (c) Warm
26. 26.🤖 if (light < 300 OR 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
27. 27.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 60. What happens? (a) red LED ON (b) green LED ON
28. 28.🤖 if (light < 400 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
29. 29.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 230 and motion is not detected (false). What happens? (a) porch lamp OFF (b) porch lamp ON
30. 30.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 19 cm. What happens? (a) buzzer beeps (b) buzzer is silent
31. 31.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 200 and motion is detected (true). What happens? (a) porch lamp ON (b) porch lamp OFF
32. 32.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 66. What happens? (a) red LED ON (b) green LED ON
33. 33.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 41. What happens? (a) red LED ON (b) green LED ON
34. 34.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 230 and motion is detected (true). What happens? (a) porch lamp ON (b) porch lamp OFF
35. 35.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 600 and motion is not detected (false). What happens? (a) porch lamp OFF (b) porch lamp ON
36. 36.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown? (a) Cool (b) Warm (c) Hot
37. 37.🤖 if (light < 300 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 ON (b) porch lamp OFF
38. 38.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 40 %. What happens? (a) pump OFF (b) pump ON
39. 39.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 649. What happens? (a) lamp OFF (b) lamp ON
40. 40.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 59. What happens? (a) red LED ON (b) green LED ON

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