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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 874 · 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.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the else part (b) neither part (c) the if part (d) both parts
  2. 2.🤖 “if (A AND B)” is true when … (a) both are false (b) only B is true (c) both A and B are true (d) only A is true
  3. 3.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 380 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  4. 4.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 370 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  5. 5.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  6. 6.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 133. What happens?     (a) lamp OFF (b) lamp ON
  7. 7.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 22 °C. What happens?     (a) fan OFF (b) fan ON
  8. 8.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 23 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  9. 9.🤖 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
  10. 10.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  11. 11.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  12. 12.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 10 %. What happens?     (a) pump ON (b) pump OFF
  13. 13.🤖 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
  14. 14.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 32 °C. What happens?     (a) fan OFF (b) fan ON
  15. 15.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 27 °C. What happens?     (a) fan OFF (b) fan ON
  16. 16.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  17. 17.🤖 if (light < 300 OR 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 (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 56. What happens?     (a) red LED ON (b) green LED ON
  19. 19.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 88. What happens?     (a) green LED ON (b) red LED ON
  20. 20.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 341. What happens?     (a) lamp ON (b) lamp OFF
  21. 21.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 360 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  22. 22.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 334. What happens?     (a) lamp OFF (b) lamp ON
  23. 23.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  24. 24.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 290 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  25. 25.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 36 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  26. 26.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 610 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  27. 27.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 620 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  28. 28.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 46. What happens?     (a) red LED ON (b) green LED ON
  29. 29.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 190 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  30. 30.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  31. 31.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 24 °C. What happens?     (a) fan ON (b) fan OFF
  32. 32.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 19 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  33. 33.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 31 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  34. 34.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 210 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  35. 35.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 60 %. What happens?     (a) pump OFF (b) pump ON
  36. 36.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 28 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  37. 37.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 30 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  38. 38.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 90 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  39. 39.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  40. 40.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 32 °C. What happens?     (a) fan ON (b) fan OFF

Answer key

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

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