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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 4 · 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 B is true (b) both are false (c) only A is true (d) both A and B are true
  2. 2.🤖 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
  3. 3.🤖 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
  4. 4.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 500 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  5. 5.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 56. What happens?     (a) red LED ON (b) green LED ON
  6. 6.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  7. 7.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  8. 8.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 310 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  9. 9.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 90 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  10. 10.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 23 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  11. 11.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 310 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  12. 12.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  13. 13.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 72. What happens?     (a) red LED ON (b) green LED ON
  14. 14.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 6 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  15. 15.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 38 °C. What happens?     (a) fan OFF (b) fan ON
  16. 16.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 27 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  17. 17.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 570 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  18. 18.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  19. 19.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  20. 20.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  21. 21.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 360 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  22. 22.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  23. 23.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  24. 24.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 26 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  25. 25.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 40 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  26. 26.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 21 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  27. 27.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 540 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  28. 28.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 45 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  29. 29.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 320 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  30. 30.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 10 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  31. 31.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 290 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  32. 32.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 62. What happens?     (a) red LED ON (b) green LED ON
  33. 33.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 136. What happens?     (a) lamp ON (b) lamp OFF
  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 OFF (b) porch lamp ON
  35. 35.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  36. 36.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  37. 37.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  38. 38.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 28 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  39. 39.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 540 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  40. 40.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 160 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF

Answer key

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

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