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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 756 · 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 < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 23 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  2. 2.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 82. What happens?     (a) red LED ON (b) green LED ON
  3. 3.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 38 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  4. 4.🤖 “if (A AND B)” is true when … (a) only B is true (b) both A and B are true (c) only A is true (d) both are false
  5. 5.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 580 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  6. 6.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 220 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  7. 7.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 26 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  8. 8.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 285. What happens?     (a) lamp ON (b) lamp OFF
  9. 9.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 42 %. What happens?     (a) pump OFF (b) pump ON
  10. 10.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the else part (b) the if part (c) both parts (d) neither part
  11. 11.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  12. 12.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 359. What happens?     (a) lamp OFF (b) lamp ON
  13. 13.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 24 °C. What happens?     (a) fan OFF (b) fan ON
  14. 14.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 420 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  15. 15.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 38 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  16. 16.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 610 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  17. 17.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 430 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  18. 18.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 23 %. What happens?     (a) pump OFF (b) pump ON
  19. 19.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 23 °C. What happens?     (a) fan OFF (b) fan ON
  20. 20.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 50 %. What happens?     (a) pump ON (b) pump OFF
  21. 21.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 45 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  22. 22.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 36 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  23. 23.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  24. 24.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 480 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  25. 25.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  26. 26.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  27. 27.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  28. 28.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 550 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  29. 29.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 27 °C. What happens?     (a) fan ON (b) fan OFF
  30. 30.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 410 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  31. 31.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 55. What happens?     (a) red LED ON (b) green LED ON
  32. 32.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  33. 33.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  34. 34.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 20 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  35. 35.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  36. 36.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 23 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  37. 37.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 240 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  38. 38.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 24 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  39. 39.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 32 °C. What happens?     (a) fan OFF (b) fan ON
  40. 40.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 36 °C. What is shown?     (a) Cool (b) Warm (c) Hot

Answer key

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

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