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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 471 · 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 < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 330 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) only B is true (b) both A and B are true (c) both are false (d) only A is true
  3. 3.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  4. 4.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  5. 5.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the if part (b) both parts (c) the else part (d) neither part
  6. 6.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 40 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  7. 7.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 52 %. What happens?     (a) pump ON (b) pump OFF
  8. 8.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 97. What happens?     (a) green LED ON (b) red LED ON
  9. 9.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 260 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  10. 10.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 22 °C. What happens?     (a) fan OFF (b) fan ON
  11. 11.🤖 if (light < 200 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 OFF (b) porch lamp ON
  12. 12.🤖 if (light < 200 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
  13. 13.🤖 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 OFF (b) porch lamp ON
  14. 14.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 44 %. What happens?     (a) pump ON (b) pump OFF
  15. 15.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 69. What happens?     (a) lamp OFF (b) lamp ON
  16. 16.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 25 °C. What happens?     (a) fan ON (b) fan OFF
  17. 17.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  18. 18.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 36 %. What happens?     (a) pump OFF (b) pump ON
  19. 19.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 23 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  20. 20.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 190 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  21. 21.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 32 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  22. 22.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  23. 23.🤖 if (light < 200 OR 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
  24. 24.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  25. 25.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  26. 26.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 15 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  27. 27.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  28. 28.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 38 %. What happens?     (a) pump OFF (b) pump ON
  29. 29.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 18 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  30. 30.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 15 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  31. 31.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 63. What happens?     (a) red LED ON (b) green LED ON
  32. 32.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 28 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  33. 33.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 6 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  34. 34.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 353. What happens?     (a) lamp ON (b) lamp OFF
  35. 35.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 37 °C. What happens?     (a) fan ON (b) fan OFF
  36. 36.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 270 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  37. 37.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 4 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  38. 38.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 537. What happens?     (a) lamp ON (b) lamp OFF
  39. 39.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 38 %. What happens?     (a) pump OFF (b) pump ON
  40. 40.🤖 if (light < 300 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 ON (b) porch lamp OFF

Answer key

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

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