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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 288 · 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 > 36) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  2. 2.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 380 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  3. 3.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 43 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  4. 4.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the if part (b) both parts (c) neither part (d) the else part
  5. 5.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 460 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  6. 6.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 26 %. What happens?     (a) pump OFF (b) pump ON
  7. 7.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 86. What happens?     (a) lamp ON (b) lamp OFF
  8. 8.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 460. What happens?     (a) lamp OFF (b) lamp ON
  9. 9.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 36 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  10. 10.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 640 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  11. 11.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 80 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  12. 12.🤖 “if (A AND B)” is true when … (a) both A and B are true (b) only A is true (c) both are false (d) only B is true
  13. 13.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 200 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  14. 14.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  15. 15.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 64. What happens?     (a) red LED ON (b) green LED ON
  16. 16.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  17. 17.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 540 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 22 °C. What happens?     (a) fan ON (b) fan OFF
  19. 19.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  20. 20.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 344. What happens?     (a) lamp OFF (b) lamp ON
  21. 21.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 31 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  22. 22.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 40 °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 21 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  24. 24.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  25. 25.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 300 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  26. 26.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 70 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  27. 27.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 15 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  28. 28.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 534. What happens?     (a) lamp ON (b) lamp OFF
  29. 29.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 8 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  30. 30.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 435. What happens?     (a) lamp OFF (b) lamp ON
  31. 31.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 31 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  32. 32.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 14 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  33. 33.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 45 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  34. 34.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 30 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  35. 35.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  36. 36.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 22 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  37. 37.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 330 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  38. 38.🤖 if (light < 200 AND 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
  39. 39.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 53. What happens?     (a) red LED ON (b) green LED ON
  40. 40.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 34 °C. What happens?     (a) fan OFF (b) fan ON

Answer key

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

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