Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 597 · 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 11 cm. What happens? (a) buzzer beeps (b) buzzer is silent
2. 2.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
   The distance sensor reads 24 cm. What happens? (a) buzzer beeps (b) buzzer is silent
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 (A AND B)” is true when … (a) both are false (b) only A is true (c) only B is true (d) both A and B are true
5. 5.🤖 if (sound > 80) { red LED ON } else { green LED ON }
   The sound sensor reads 66. What happens? (a) red LED ON (b) green LED ON
6. 6.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
   The temperature is 25 °C. What is shown? (a) Cool (b) Warm (c) Hot
7. 7.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
   The temperature is 44 °C. What is shown? (a) Cool (b) Hot (c) Warm
8. 8.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
   The light reading is 120 and motion is not detected (false). What happens? (a) porch lamp OFF (b) porch lamp ON
9. 9.🤖 if (light < 400 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
10. 10.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 61. What happens? (a) red LED ON (b) green LED ON
11. 11.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 10 cm. What happens? (a) buzzer beeps (b) buzzer is silent
12. 12.🤖 if (light < 400 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
13. 13.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 40 °C. What happens? (a) fan ON (b) fan OFF
14. 14.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 280 and motion is not detected (false). What happens? (a) porch lamp OFF (b) porch lamp ON
15. 15.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 65 %. What happens? (a) pump OFF (b) pump ON
16. 16.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 26 %. What happens? (a) pump OFF (b) pump ON
17. 17.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 43 °C. What is shown? (a) Warm (b) Cool (c) Hot
18. 18.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 100 and motion is not detected (false). What happens? (a) porch lamp OFF (b) porch lamp ON
19. 19.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 30 %. What happens? (a) pump OFF (b) pump ON
20. 20.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 200 and motion is not detected (false). What happens? (a) porch lamp OFF (b) porch lamp ON
21. 21.🤖 if (light < 300 OR 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
22. 22.🤖 if (light < 400 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
23. 23.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 445. What happens? (a) lamp ON (b) lamp OFF
24. 24.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 44. What happens? (a) red LED ON (b) green LED ON
25. 25.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 21 cm. What happens? (a) buzzer is silent (b) buzzer beeps
26. 26.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 100 and motion is detected (true). What happens? (a) porch lamp ON (b) porch lamp OFF
27. 27.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 260 and motion is not detected (false). What happens? (a) porch lamp OFF (b) porch lamp ON
28. 28.🤖 if (light < 200 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
29. 29.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 61 %. What happens? (a) pump OFF (b) pump ON
30. 30.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 22 °C. What happens? (a) fan OFF (b) fan ON
31. 31.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 79. What happens? (a) red LED ON (b) green LED ON
32. 32.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 290 and motion is detected (true). What happens? (a) porch lamp ON (b) porch lamp OFF
33. 33.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 90. What happens? (a) green LED ON (b) red LED ON
34. 34.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 32 °C. What is shown? (a) Cool (b) Warm (c) Hot
35. 35.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 19 cm. What happens? (a) buzzer is silent (b) buzzer beeps
36. 36.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 149. What happens? (a) lamp OFF (b) lamp ON
37. 37.🤖 if (light < 300 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
38. 38.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 30 °C. What is shown? (a) Warm (b) Hot (c) Cool
39. 39.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 80. What happens? (a) green LED ON (b) red LED ON
40. 40.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 44 °C. What is shown? (a) Warm (b) Hot (c) Cool

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