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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 296 · 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 (temperature > 38) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 38 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  2. 2.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  3. 3.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 35 °C. What happens?     (a) fan OFF (b) fan ON
  4. 4.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 86. What happens?     (a) red LED ON (b) green LED ON
  5. 5.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 20 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  6. 6.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  7. 7.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) both parts (b) neither part (c) the if part (d) the else part
  8. 8.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 44 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  9. 9.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 50. What happens?     (a) green LED ON (b) red LED ON
  10. 10.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 77. What happens?     (a) green LED ON (b) red LED ON
  11. 11.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 24 °C. What happens?     (a) fan OFF (b) fan ON
  12. 12.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 336. What happens?     (a) lamp OFF (b) lamp ON
  13. 13.🤖 if (light < 300 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
  14. 14.🤖 if (light < 400 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 ON (b) porch lamp OFF
  15. 15.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 57. What happens?     (a) green LED ON (b) red LED ON
  16. 16.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 550 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  17. 17.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 170 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  18. 18.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 34 °C. What happens?     (a) fan ON (b) fan OFF
  19. 19.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  20. 20.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 27 °C. What happens?     (a) fan ON (b) fan OFF
  21. 21.🤖 “if (A AND B)” is true when … (a) only B is true (b) both are false (c) only A is true (d) both A and B are true
  22. 22.🤖 if (temperature > 34) { 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
  23. 23.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  24. 24.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  25. 25.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 37 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  26. 26.🤖 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 ON (b) porch lamp OFF
  27. 27.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 87. What happens?     (a) lamp ON (b) lamp OFF
  28. 28.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  29. 29.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 23 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  30. 30.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 28 °C. What happens?     (a) fan OFF (b) fan ON
  31. 31.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 26 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  32. 32.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 37 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  33. 33.🤖 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
  34. 34.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 41 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  35. 35.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 580 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  36. 36.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  37. 37.🤖 if (light < 400 OR 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
  38. 38.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 38 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  39. 39.🤖 if (light < 400 OR 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
  40. 40.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 29 °C. What happens?     (a) fan ON (b) fan OFF

Answer key

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

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