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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 383 · 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 440 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  2. 2.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 72. What happens?     (a) red LED ON (b) green LED ON
  3. 3.🤖 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
  4. 4.🤖 “if (A AND B)” is true when … (a) only A is true (b) both are false (c) only B is true (d) both A and B are true
  5. 5.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 30 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  6. 6.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  7. 7.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 180 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  8. 8.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the else part (b) both parts (c) neither part (d) the if part
  9. 9.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  10. 10.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 400 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  11. 11.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 20 °C. What happens?     (a) fan OFF (b) fan ON
  12. 12.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 580 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 38 °C. What happens?     (a) fan OFF (b) fan ON
  14. 14.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  15. 15.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  16. 16.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 17 °C. What happens?     (a) fan ON (b) fan OFF
  17. 17.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 540 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  18. 18.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 17 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  19. 19.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 24 °C. What happens?     (a) fan OFF (b) fan ON
  20. 20.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  21. 21.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 560 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  22. 22.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 560 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  23. 23.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 76. What happens?     (a) red LED ON (b) green LED ON
  24. 24.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  25. 25.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 31 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  26. 26.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 24 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  27. 27.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 37 °C. What happens?     (a) fan ON (b) fan OFF
  28. 28.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  29. 29.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 23 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  30. 30.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 650 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  31. 31.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 7 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  32. 32.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 91. What happens?     (a) red LED ON (b) green LED ON
  33. 33.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  34. 34.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 510 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  35. 35.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 140 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  36. 36.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 622. What happens?     (a) lamp OFF (b) lamp ON
  37. 37.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 110 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  38. 38.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 41 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  39. 39.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 93. What happens?     (a) green LED ON (b) red LED ON
  40. 40.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 98. What happens?     (a) green LED ON (b) red LED ON

Answer key

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

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