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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 479 · 40 questions
TalentJR

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.

NameDateTime takenScore ___ / 40
  1. 1.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 460 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  2. 2.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the if part (b) both parts (c) neither part (d) the else part
  3. 3.🤖 “if (A AND B)” is true when … (a) only B is true (b) both A and B are true (c) both are false (d) only A is true
  4. 4.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 219. What happens?     (a) lamp ON (b) lamp OFF
  5. 5.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 113. What happens?     (a) lamp ON (b) lamp OFF
  6. 6.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 64. What happens?     (a) green LED ON (b) red LED ON
  7. 7.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 65. What happens?     (a) red LED ON (b) green LED ON
  8. 8.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 58. What happens?     (a) red LED ON (b) green LED ON
  9. 9.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  10. 10.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 29 °C. What happens?     (a) fan ON (b) fan OFF
  11. 11.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 353. What happens?     (a) lamp OFF (b) lamp ON
  12. 12.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 14 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  13. 13.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 24 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  14. 14.🤖 if (light < 200 OR 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
  15. 15.🤖 if (light < 400 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 ON (b) porch lamp OFF
  16. 16.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  17. 17.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 40 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  18. 18.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 68 %. What happens?     (a) pump ON (b) pump OFF
  19. 19.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 31 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  20. 20.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 43 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  21. 21.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 26 °C. What happens?     (a) fan ON (b) fan OFF
  22. 22.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 298. What happens?     (a) lamp ON (b) lamp OFF
  23. 23.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 37 %. What happens?     (a) pump ON (b) pump OFF
  24. 24.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 37 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  25. 25.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 419. What happens?     (a) lamp ON (b) lamp OFF
  26. 26.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  27. 27.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  28. 28.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 77. What happens?     (a) lamp ON (b) lamp OFF
  29. 29.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 30 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  30. 30.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 36 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  31. 31.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 570 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 90 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  33. 33.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  34. 34.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 21 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  35. 35.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 32 °C. What happens?     (a) fan ON (b) fan OFF
  36. 36.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  37. 37.🤖 if (light < 200 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
  38. 38.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 190 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  39. 39.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 24 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  40. 40.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 74. What happens?     (a) green LED ON (b) red LED ON

Answer key

  1. porch lamp OFF
  2. the else part
  3. both A and B are true
  4. lamp ON
  5. lamp ON
  6. green LED ON
  7. green LED ON
  8. green LED ON
  9. Warm
  10. fan OFF
  11. lamp ON
  12. buzzer is silent
  13. Warm
  14. porch lamp OFF
  15. porch lamp OFF
  16. Cool
  17. Hot
  18. pump OFF
  19. Warm
  20. Hot
  21. fan OFF
  22. lamp ON
  23. pump OFF
  24. Hot
  25. lamp ON
  26. Hot
  27. Hot
  28. lamp ON
  29. Warm
  30. Hot
  31. porch lamp OFF
  32. porch lamp ON
  33. Cool
  34. buzzer beeps
  35. fan ON
  36. Cool
  37. porch lamp ON
  38. porch lamp ON
  39. Warm
  40. green LED ON

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