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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 187 · 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 < 400 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
  2. 2.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  3. 3.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 220 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  4. 4.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 279. What happens?     (a) lamp OFF (b) lamp ON
  5. 5.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 15 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  6. 6.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  7. 7.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 31 °C. What happens?     (a) fan OFF (b) fan ON
  8. 8.🤖 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
  9. 9.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 40 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  10. 10.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 28 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  11. 11.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  12. 12.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  13. 13.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the if part (b) neither part (c) both parts (d) the else part
  14. 14.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 140 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  15. 15.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 59. What happens?     (a) red LED ON (b) green LED ON
  16. 16.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  17. 17.🤖 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
  18. 18.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 71. What happens?     (a) green LED ON (b) red LED ON
  19. 19.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  20. 20.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 70 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  21. 21.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  22. 22.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 28 °C. What happens?     (a) fan OFF (b) fan ON
  23. 23.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 69. What happens?     (a) red LED ON (b) green LED ON
  24. 24.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 233. What happens?     (a) lamp ON (b) lamp OFF
  25. 25.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 68 %. What happens?     (a) pump OFF (b) pump ON
  26. 26.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  27. 27.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 30 °C. What happens?     (a) fan OFF (b) fan ON
  28. 28.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  29. 29.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 41 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  30. 30.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 412. What happens?     (a) lamp OFF (b) lamp ON
  31. 31.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 240 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  32. 32.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 170 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  33. 33.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 38 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  34. 34.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  35. 35.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 500 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  36. 36.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  37. 37.🤖 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
  38. 38.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 19 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  39. 39.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 36 °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 65. What happens?     (a) red LED ON (b) green LED ON

Answer key

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

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