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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 179 · 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 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 410 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  2. 2.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  3. 3.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) both parts (b) the else part (c) neither part (d) the if part
  4. 4.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 32 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  5. 5.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 357. What happens?     (a) lamp ON (b) lamp OFF
  6. 6.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 44 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  7. 7.🤖 if (light < 200 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 OFF (b) porch lamp ON
  8. 8.🤖 “if (A AND B)” is true when … (a) both A and B are true (b) only B is true (c) only A is true (d) both are false
  9. 9.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 6 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  10. 10.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 79. What happens?     (a) red LED ON (b) green LED ON
  11. 11.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 190 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  12. 12.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 70 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  13. 13.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  14. 14.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 9 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  15. 15.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 19 %. What happens?     (a) pump OFF (b) pump ON
  16. 16.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 388. What happens?     (a) lamp ON (b) lamp OFF
  17. 17.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 56. What happens?     (a) red LED ON (b) green LED ON
  18. 18.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  19. 19.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 45 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  20. 20.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 20 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  21. 21.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  22. 22.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 36 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  23. 23.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 39 %. What happens?     (a) pump ON (b) pump OFF
  24. 24.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 320 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  25. 25.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 34 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  26. 26.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  27. 27.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 29 °C. What happens?     (a) fan OFF (b) fan ON
  28. 28.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 8 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  29. 29.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 83. What happens?     (a) green LED ON (b) red LED ON
  30. 30.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  31. 31.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 19 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  32. 32.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 24 °C. What happens?     (a) fan ON (b) fan OFF
  33. 33.🤖 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
  34. 34.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 90. What happens?     (a) red LED ON (b) green LED ON
  35. 35.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 258. What happens?     (a) lamp ON (b) lamp OFF
  36. 36.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 32 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  37. 37.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  38. 38.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 13 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  39. 39.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 340 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  40. 40.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 42 °C. What is shown?     (a) Hot (b) Cool (c) Warm

Answer key

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

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