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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 802 · 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 (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 84. What happens?     (a) green LED ON (b) red LED ON
  2. 2.🤖 “if (A AND B)” is true when … (a) only A is true (b) only B is true (c) both A and B are true (d) both are false
  3. 3.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  4. 4.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 420 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  5. 5.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  6. 6.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 81. What happens?     (a) red LED ON (b) green LED ON
  7. 7.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 31 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  8. 8.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the else part (b) the if part (c) neither part (d) both parts
  9. 9.🤖 if (light < 200 AND 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
  10. 10.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 31 °C. What happens?     (a) fan ON (b) fan OFF
  11. 11.🤖 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
  12. 12.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 310 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  13. 13.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 70 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  14. 14.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 460 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  15. 15.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 75. What happens?     (a) red LED ON (b) green LED ON
  16. 16.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 40 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  17. 17.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  18. 18.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 86. What happens?     (a) green LED ON (b) red LED ON
  19. 19.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 160. What happens?     (a) lamp OFF (b) lamp ON
  20. 20.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 500 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  21. 21.🤖 if (light < 200 AND 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
  22. 22.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  23. 23.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 480 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  24. 24.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 52. What happens?     (a) green LED ON (b) red LED ON
  25. 25.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 24 °C. What happens?     (a) fan OFF (b) fan ON
  26. 26.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 50. What happens?     (a) red LED ON (b) green LED ON
  27. 27.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 33 °C. What happens?     (a) fan ON (b) fan OFF
  28. 28.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 44 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  29. 29.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 100 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  30. 30.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  31. 31.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 240 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  32. 32.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 471. What happens?     (a) lamp OFF (b) lamp ON
  33. 33.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 160 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  34. 34.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 32 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  35. 35.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 30 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  36. 36.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 99. What happens?     (a) green LED ON (b) red LED ON
  37. 37.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 13 %. What happens?     (a) pump ON (b) pump OFF
  38. 38.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 33 °C. What happens?     (a) fan OFF (b) fan ON
  39. 39.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 280 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  40. 40.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 278. What happens?     (a) lamp ON (b) lamp OFF

Answer key

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

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