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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 933 · 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 > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 19 °C. What happens?     (a) fan ON (b) fan OFF
  2. 2.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 28 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  3. 3.🤖 “if (A AND B)” is true when … (a) both A and B are true (b) only B is true (c) both are false (d) only A is true
  4. 4.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) both parts (b) the else part (c) the if part (d) neither part
  5. 5.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 75. What happens?     (a) lamp ON (b) lamp OFF
  6. 6.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 24 °C. What happens?     (a) fan OFF (b) fan ON
  7. 7.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 21 %. What happens?     (a) pump OFF (b) pump ON
  8. 8.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 16 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  9. 9.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 47 %. What happens?     (a) pump ON (b) pump OFF
  10. 10.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 542. What happens?     (a) lamp OFF (b) lamp ON
  11. 11.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 19 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  12. 12.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  13. 13.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 26 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  14. 14.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 23 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  15. 15.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 66. What happens?     (a) green LED ON (b) red LED ON
  16. 16.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 340 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  17. 17.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 100 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  18. 18.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  19. 19.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 253. What happens?     (a) lamp ON (b) lamp OFF
  20. 20.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 30 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  21. 21.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 437. What happens?     (a) lamp ON (b) lamp OFF
  22. 22.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 33 °C. What happens?     (a) fan ON (b) fan OFF
  23. 23.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 84. What happens?     (a) lamp ON (b) lamp OFF
  24. 24.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  25. 25.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 23 °C. What happens?     (a) fan ON (b) fan OFF
  26. 26.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 44 %. What happens?     (a) pump ON (b) pump OFF
  27. 27.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 11 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  28. 28.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  29. 29.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  30. 30.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 28 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  31. 31.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 610 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  32. 32.🤖 if (light < 300 OR 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
  33. 33.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  34. 34.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  35. 35.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  36. 36.🤖 if (light < 400 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 OFF (b) porch lamp ON
  37. 37.🤖 if (light < 400 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 ON (b) porch lamp OFF
  38. 38.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 410 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  39. 39.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 26 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  40. 40.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 40 °C. What is shown?     (a) Hot (b) Cool (c) Warm

Answer key

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

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