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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 365 · 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 (A AND B)” is true when … (a) only A is true (b) both are false (c) both A and B are true (d) only B is true
  2. 2.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the if part (b) both parts (c) the else part (d) neither part
  3. 3.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 440 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  4. 4.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 264. What happens?     (a) lamp OFF (b) lamp ON
  5. 5.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  6. 6.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  7. 7.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 220. What happens?     (a) lamp OFF (b) lamp ON
  8. 8.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 27 °C. What happens?     (a) fan OFF (b) fan ON
  9. 9.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  10. 10.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  11. 11.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 26 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  12. 12.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 32 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  13. 13.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 29 °C. What happens?     (a) fan OFF (b) fan ON
  14. 14.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 46 %. What happens?     (a) pump ON (b) pump OFF
  15. 15.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 260 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  16. 16.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 272. What happens?     (a) lamp ON (b) lamp OFF
  17. 17.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  18. 18.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 29 °C. What happens?     (a) fan ON (b) fan OFF
  19. 19.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 63. What happens?     (a) red LED ON (b) green LED ON
  20. 20.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 38 °C. What happens?     (a) fan OFF (b) fan ON
  21. 21.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 190 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  22. 22.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 6 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  23. 23.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 503. What happens?     (a) lamp OFF (b) lamp ON
  24. 24.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 33 %. What happens?     (a) pump ON (b) pump OFF
  25. 25.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  26. 26.🤖 if (light < 200 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
  27. 27.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 170 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  28. 28.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 140 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  29. 29.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 371. What happens?     (a) lamp OFF (b) lamp ON
  30. 30.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 230. What happens?     (a) lamp OFF (b) lamp ON
  31. 31.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 3 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  32. 32.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 410. What happens?     (a) lamp OFF (b) lamp ON
  33. 33.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 180 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  34. 34.🤖 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 OFF (b) porch lamp ON
  35. 35.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  36. 36.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 470 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  37. 37.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  38. 38.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 11 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  39. 39.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 28 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  40. 40.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 23 °C. What happens?     (a) fan OFF (b) fan ON

Answer key

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

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