← If / else with sensors lesson New set →

Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 451 · 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 380 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  2. 2.🤖 “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
  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 OFF (b) porch lamp ON
  4. 4.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the if part (b) neither part (c) both parts (d) the else part
  5. 5.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 431. What happens?     (a) lamp ON (b) lamp OFF
  6. 6.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 20 %. What happens?     (a) pump ON (b) pump OFF
  7. 7.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 250 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  8. 8.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 150. What happens?     (a) lamp OFF (b) lamp ON
  9. 9.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 470 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  10. 10.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 68. What happens?     (a) green LED ON (b) red LED ON
  11. 11.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 61. What happens?     (a) red LED ON (b) green LED ON
  12. 12.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 280 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  13. 13.🤖 if (light < 300 OR 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
  14. 14.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 68. What happens?     (a) green LED ON (b) red LED ON
  15. 15.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 110 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  16. 16.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  17. 17.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  18. 18.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  19. 19.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 270 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  20. 20.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 43 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  21. 21.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 34 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  22. 22.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  23. 23.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  24. 24.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 59. What happens?     (a) red LED ON (b) green LED ON
  25. 25.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 43 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  26. 26.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 41 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  27. 27.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 57. What happens?     (a) green LED ON (b) red LED ON
  28. 28.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 30 °C. What happens?     (a) fan OFF (b) fan ON
  29. 29.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 24 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  30. 30.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  31. 31.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 36 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  32. 32.🤖 if (light < 400 AND 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
  33. 33.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 58. What happens?     (a) red LED ON (b) green LED ON
  34. 34.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 18 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  35. 35.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 31 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  36. 36.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 50. What happens?     (a) green LED ON (b) red LED ON
  37. 37.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 378. What happens?     (a) lamp ON (b) lamp OFF
  38. 38.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 43 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  39. 39.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 36 °C. What happens?     (a) fan OFF (b) fan ON
  40. 40.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Hot (b) Cool (c) Warm

Answer key

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

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids