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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 595 · 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 (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 94. What happens?     (a) lamp OFF (b) lamp ON
  2. 2.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  3. 3.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 40 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  4. 4.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  5. 5.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 547. What happens?     (a) lamp ON (b) lamp OFF
  6. 6.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 67. What happens?     (a) green LED ON (b) red LED ON
  7. 7.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  8. 8.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 209. What happens?     (a) lamp OFF (b) lamp ON
  9. 9.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the else part (b) the if part (c) neither part (d) both parts
  10. 10.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  11. 11.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 25 %. What happens?     (a) pump ON (b) pump OFF
  12. 12.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  13. 13.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 200 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  14. 14.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 54. What happens?     (a) red LED ON (b) green LED ON
  15. 15.🤖 if (light < 300 OR 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
  16. 16.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 470 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  17. 17.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 38 °C. What happens?     (a) fan OFF (b) fan ON
  18. 18.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 12 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  19. 19.🤖 if (light < 400 OR 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
  20. 20.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 190. What happens?     (a) lamp OFF (b) lamp ON
  21. 21.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 40 %. What happens?     (a) pump OFF (b) pump ON
  22. 22.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 40. What happens?     (a) green LED ON (b) red LED ON
  23. 23.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 29 %. What happens?     (a) pump ON (b) pump OFF
  24. 24.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 210 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  25. 25.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 26 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  26. 26.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 395. What happens?     (a) lamp OFF (b) lamp ON
  27. 27.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  28. 28.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 32 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  29. 29.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 60 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  30. 30.🤖 if (light < 200 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
  31. 31.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 40 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  32. 32.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 53 %. What happens?     (a) pump OFF (b) pump ON
  33. 33.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 33 °C. What happens?     (a) fan OFF (b) fan ON
  34. 34.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 609. What happens?     (a) lamp OFF (b) lamp ON
  35. 35.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  36. 36.🤖 “if (A AND B)” is true when … (a) both A and B are true (b) only B is true (c) only A is true (d) both are false
  37. 37.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 23 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  38. 38.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 29 °C. What happens?     (a) fan OFF (b) fan ON
  39. 39.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 120 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  40. 40.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 47. What happens?     (a) red LED ON (b) green LED ON

Answer key

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

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