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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 738 · 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 < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 540 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  2. 2.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  3. 3.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 530 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  4. 4.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 138. What happens?     (a) lamp OFF (b) lamp ON
  5. 5.🤖 “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
  6. 6.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  7. 7.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 16 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  8. 8.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the else part (b) the if part (c) neither part (d) both parts
  9. 9.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 110 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  10. 10.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 26 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  11. 11.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  12. 12.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 360 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  13. 13.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 20 %. What happens?     (a) pump OFF (b) pump ON
  14. 14.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 340 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  15. 15.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 37 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  16. 16.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  17. 17.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 24 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  18. 18.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 24 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  19. 19.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 260 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  20. 20.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  21. 21.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  22. 22.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  23. 23.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 444. What happens?     (a) lamp OFF (b) lamp ON
  24. 24.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  25. 25.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 33 °C. What happens?     (a) fan OFF (b) fan ON
  26. 26.🤖 if (temperature > 34) { 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
  27. 27.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 343. What happens?     (a) lamp OFF (b) lamp ON
  28. 28.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 14 %. What happens?     (a) pump OFF (b) pump ON
  29. 29.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 580 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  30. 30.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 32 °C. What happens?     (a) fan OFF (b) fan ON
  31. 31.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 341. What happens?     (a) lamp ON (b) lamp OFF
  32. 32.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 180 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  33. 33.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 262. What happens?     (a) lamp OFF (b) lamp ON
  34. 34.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  35. 35.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 235. What happens?     (a) lamp ON (b) lamp OFF
  36. 36.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  37. 37.🤖 if (temperature > 36) { 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
  38. 38.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 272. What happens?     (a) lamp ON (b) lamp OFF
  39. 39.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 87. What happens?     (a) green LED ON (b) red LED ON
  40. 40.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 43 °C. What is shown?     (a) Warm (b) Hot (c) Cool

Answer key

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

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