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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 135 · 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 510 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  2. 2.🤖 “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
  3. 3.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 24 °C. What happens?     (a) fan OFF (b) fan ON
  4. 4.🤖 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
  5. 5.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 25 °C. What happens?     (a) fan ON (b) fan OFF
  6. 6.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) neither part (b) the else part (c) both parts (d) the if part
  7. 7.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 460. What happens?     (a) lamp OFF (b) lamp ON
  8. 8.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  9. 9.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 300 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  10. 10.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 53. What happens?     (a) green LED ON (b) red LED ON
  11. 11.🤖 if (light < 300 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 ON (b) porch lamp OFF
  12. 12.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 97. What happens?     (a) red LED ON (b) green LED ON
  13. 13.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 510 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  14. 14.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 16 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  15. 15.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 60 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  16. 16.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  17. 17.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 640 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  18. 18.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  19. 19.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 49 %. What happens?     (a) pump OFF (b) pump ON
  20. 20.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  21. 21.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 77. What happens?     (a) red LED ON (b) green LED ON
  22. 22.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 69. What happens?     (a) red LED ON (b) green LED ON
  23. 23.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 24 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  24. 24.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  25. 25.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 43 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  26. 26.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 130 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  27. 27.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  28. 28.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 42 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  29. 29.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 42 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  30. 30.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 41 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  31. 31.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 24 °C. What happens?     (a) fan OFF (b) fan ON
  32. 32.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 14 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  33. 33.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  34. 34.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 290 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  35. 35.🤖 if (light < 200 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 ON (b) porch lamp OFF
  36. 36.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  37. 37.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 26 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  38. 38.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 26 °C. What happens?     (a) fan ON (b) fan OFF
  39. 39.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 53 %. What happens?     (a) pump ON (b) pump OFF
  40. 40.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Cool (b) Warm (c) Hot

Answer key

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

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