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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 975 · 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 < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 376. What happens?     (a) lamp ON (b) lamp OFF
  2. 2.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 8 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  3. 3.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 25 °C. What happens?     (a) fan ON (b) fan OFF
  4. 4.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 26 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  5. 5.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 230 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  6. 6.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 37 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  7. 7.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 610 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  8. 8.🤖 “if (A AND B)” is true when … (a) both A and B are true (b) both are false (c) only B is true (d) only A is true
  9. 9.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  10. 10.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 600 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  11. 11.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  12. 12.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  13. 13.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  14. 14.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 400 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  15. 15.🤖 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
  16. 16.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 42 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  17. 17.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 52. What happens?     (a) red LED ON (b) green LED ON
  18. 18.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 220 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  19. 19.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 11 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  20. 20.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 38 %. What happens?     (a) pump OFF (b) pump ON
  21. 21.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  22. 22.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 28 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  23. 23.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 26 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  24. 24.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 46. What happens?     (a) red LED ON (b) green LED ON
  25. 25.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 31 %. What happens?     (a) pump ON (b) pump OFF
  26. 26.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 32 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  27. 27.🤖 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
  28. 28.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  29. 29.🤖 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
  30. 30.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 31 %. What happens?     (a) pump ON (b) pump OFF
  31. 31.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  32. 32.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 600 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  33. 33.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 560 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  34. 34.🤖 if (light < 300 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 ON (b) porch lamp OFF
  35. 35.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 80. What happens?     (a) red LED ON (b) green LED ON
  36. 36.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 32 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  37. 37.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 97. What happens?     (a) green LED ON (b) red LED ON
  38. 38.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 14 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  39. 39.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  40. 40.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 24 °C. What happens?     (a) fan ON (b) fan OFF

Answer key

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

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