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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 350 · 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 if part (b) the else part (c) neither part (d) both parts
  2. 2.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 200 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  3. 3.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  4. 4.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  5. 5.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 26 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  6. 6.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  7. 7.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 34 °C. What happens?     (a) fan ON (b) fan OFF
  8. 8.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  9. 9.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 25 °C. What happens?     (a) fan OFF (b) fan ON
  10. 10.🤖 “if (A AND B)” is true when … (a) only B is true (b) both A and B are true (c) only A is true (d) both are false
  11. 11.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 170 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  12. 12.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 18 °C. What happens?     (a) fan ON (b) fan OFF
  13. 13.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 32 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  14. 14.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 80 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  15. 15.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 88. What happens?     (a) red LED ON (b) green LED ON
  16. 16.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 467. What happens?     (a) lamp ON (b) lamp OFF
  17. 17.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 28 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  18. 18.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 314. What happens?     (a) lamp ON (b) lamp OFF
  19. 19.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 470 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  20. 20.🤖 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
  21. 21.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 81. What happens?     (a) green LED ON (b) red LED ON
  22. 22.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  23. 23.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 31 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  24. 24.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 330 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  25. 25.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  26. 26.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  27. 27.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  28. 28.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 580 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  29. 29.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 26 °C. What happens?     (a) fan OFF (b) fan ON
  30. 30.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 26 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  31. 31.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 45 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  32. 32.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 38 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  33. 33.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 18 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  34. 34.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 490 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  35. 35.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 17 °C. What happens?     (a) fan OFF (b) fan ON
  36. 36.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 520 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  37. 37.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  38. 38.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 70. What happens?     (a) green LED ON (b) red LED ON
  39. 39.🤖 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
  40. 40.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 451. What happens?     (a) lamp OFF (b) lamp ON

Answer key

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

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