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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 175 · 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) only A is true (b) both are false (c) both A and B are true (d) only B is true
  2. 2.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  3. 3.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 275. What happens?     (a) lamp OFF (b) lamp ON
  4. 4.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  5. 5.🤖 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
  6. 6.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 23 %. What happens?     (a) pump ON (b) pump OFF
  7. 7.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 43. What happens?     (a) green LED ON (b) red LED ON
  8. 8.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 260 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  9. 9.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 11 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  10. 10.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 29 °C. What happens?     (a) fan OFF (b) fan ON
  11. 11.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 28 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  12. 12.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 11 %. What happens?     (a) pump OFF (b) pump ON
  13. 13.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  14. 14.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 74. What happens?     (a) green LED ON (b) red LED ON
  15. 15.🤖 if (temperature > 30) { 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
  16. 16.🤖 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 ON (b) porch lamp OFF
  17. 17.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 120 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  18. 18.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 310 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  19. 19.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 59. What happens?     (a) red LED ON (b) green LED ON
  20. 20.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 280 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  21. 21.🤖 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 OFF (b) porch lamp ON
  22. 22.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 67. What happens?     (a) green LED ON (b) red LED ON
  23. 23.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  24. 24.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  25. 25.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 41 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  26. 26.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 23 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  27. 27.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 57 %. What happens?     (a) pump OFF (b) pump ON
  28. 28.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 235. What happens?     (a) lamp OFF (b) lamp ON
  29. 29.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 23 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  30. 30.🤖 if (light < 200 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
  31. 31.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 160 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  32. 32.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 560 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  33. 33.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  34. 34.🤖 if (light < 300 OR 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
  35. 35.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 348. What happens?     (a) lamp ON (b) lamp OFF
  36. 36.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 130 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  37. 37.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  38. 38.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 37 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  39. 39.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 430 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  40. 40.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 630 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON

Answer key

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

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