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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 835 · 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 (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 31 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  2. 2.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 77. What happens?     (a) green LED ON (b) red LED ON
  3. 3.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 120 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  4. 4.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 22 °C. What happens?     (a) fan ON (b) fan OFF
  5. 5.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 202. What happens?     (a) lamp OFF (b) lamp ON
  6. 6.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 570 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  7. 7.🤖 “if (A AND B)” is true when … (a) only B is true (b) both are false (c) both A and B are true (d) only A is true
  8. 8.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 40 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  9. 9.🤖 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
  10. 10.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 22 %. What happens?     (a) pump ON (b) pump OFF
  11. 11.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 570 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  12. 12.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  13. 13.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  14. 14.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 330. What happens?     (a) lamp OFF (b) lamp ON
  15. 15.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 630 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  16. 16.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 61. What happens?     (a) red LED ON (b) green LED ON
  17. 17.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 8 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  18. 18.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 38 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  19. 19.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  20. 20.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 10 %. What happens?     (a) pump ON (b) pump OFF
  21. 21.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 413. What happens?     (a) lamp OFF (b) lamp ON
  22. 22.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 50 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  23. 23.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 32 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  24. 24.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 36 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  25. 25.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 23 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  26. 26.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 250 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  27. 27.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 20 %. What happens?     (a) pump ON (b) pump OFF
  28. 28.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  29. 29.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 16 %. What happens?     (a) pump OFF (b) pump ON
  30. 30.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 37 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  31. 31.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  32. 32.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  33. 33.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 336. What happens?     (a) lamp ON (b) lamp OFF
  34. 34.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 390 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  35. 35.🤖 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
  36. 36.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 64. What happens?     (a) green LED ON (b) red LED ON
  37. 37.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 13 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  38. 38.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 31 °C. What happens?     (a) fan OFF (b) fan ON
  39. 39.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 130 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  40. 40.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 42 °C. What is shown?     (a) Warm (b) Cool (c) Hot

Answer key

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

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