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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 691 · 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 < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 14 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  2. 2.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 124. What happens?     (a) lamp OFF (b) lamp ON
  3. 3.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) neither part (b) the else part (c) both parts (d) the if part
  4. 4.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 217. What happens?     (a) lamp OFF (b) lamp ON
  5. 5.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  6. 6.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 18 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  7. 7.🤖 “if (A AND B)” is true when … (a) both are false (b) only A is true (c) only B is true (d) both A and B are true
  8. 8.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 44 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  9. 9.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 150 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  10. 10.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 262. What happens?     (a) lamp OFF (b) lamp ON
  11. 11.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  12. 12.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 6 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  13. 13.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 31 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  14. 14.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 332. What happens?     (a) lamp ON (b) lamp OFF
  15. 15.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 50 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  16. 16.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  17. 17.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  18. 18.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 31 %. What happens?     (a) pump OFF (b) pump ON
  19. 19.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  20. 20.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 86. What happens?     (a) red LED ON (b) green LED ON
  21. 21.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  22. 22.🤖 if (light < 400 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
  23. 23.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 38 °C. What happens?     (a) fan ON (b) fan OFF
  24. 24.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 370 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  25. 25.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 24 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  26. 26.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 240 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  27. 27.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 71. What happens?     (a) green LED ON (b) red LED ON
  28. 28.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 260 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  29. 29.🤖 if (light < 300 OR 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
  30. 30.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 12 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  31. 31.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 60. What happens?     (a) lamp OFF (b) lamp ON
  32. 32.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 30 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  33. 33.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 315. What happens?     (a) lamp OFF (b) lamp ON
  34. 34.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 44 %. What happens?     (a) pump ON (b) pump OFF
  35. 35.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 590 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  36. 36.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 32 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  37. 37.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 380 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  38. 38.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 60 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  39. 39.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  40. 40.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Warm (b) Cool (c) Hot

Answer key

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

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