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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 689 · 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 (A AND B)” is true when … (a) both A and B are true (b) both are false (c) only B is true (d) only A is true
  2. 2.🤖 if (light < 200 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
  3. 3.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) neither part (b) both parts (c) the else part (d) the if part
  4. 4.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 18 °C. What happens?     (a) fan ON (b) fan OFF
  5. 5.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 100 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  6. 6.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  7. 7.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 60. What happens?     (a) red LED ON (b) green LED ON
  8. 8.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  9. 9.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 56 %. What happens?     (a) pump ON (b) pump OFF
  10. 10.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 24 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  11. 11.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 250 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  12. 12.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 306. What happens?     (a) lamp ON (b) lamp OFF
  13. 13.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 24 °C. What happens?     (a) fan OFF (b) fan ON
  14. 14.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 37 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  15. 15.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  16. 16.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 590 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  17. 17.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  18. 18.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 390 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  19. 19.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  20. 20.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 52 %. What happens?     (a) pump ON (b) pump OFF
  21. 21.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  22. 22.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 180 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  23. 23.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 270 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  24. 24.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 180. What happens?     (a) lamp ON (b) lamp OFF
  25. 25.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  26. 26.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 29 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  27. 27.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 38 °C. What happens?     (a) fan ON (b) fan OFF
  28. 28.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  29. 29.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 37 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  30. 30.🤖 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
  31. 31.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 24 °C. What happens?     (a) fan OFF (b) fan ON
  32. 32.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 520 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  33. 33.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 80 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  34. 34.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 75. What happens?     (a) lamp ON (b) lamp OFF
  35. 35.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 286. What happens?     (a) lamp ON (b) lamp OFF
  36. 36.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 480 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  37. 37.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 287. What happens?     (a) lamp ON (b) lamp OFF
  38. 38.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 9 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  39. 39.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 352. What happens?     (a) lamp OFF (b) lamp ON
  40. 40.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 390 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON

Answer key

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

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