← If / else with sensors lesson New set →

Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 318 · 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 480 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) only A is true (b) only B is true (c) both are false (d) both A and B are true
  3. 3.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the else part (b) neither part (c) both parts (d) the if part
  4. 4.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 89. What happens?     (a) green LED ON (b) red LED ON
  5. 5.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 24 °C. What happens?     (a) fan OFF (b) fan ON
  6. 6.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 496. What happens?     (a) lamp OFF (b) lamp ON
  7. 7.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  8. 8.🤖 if (light < 300 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
  9. 9.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  10. 10.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 30 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  11. 11.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 27 °C. What happens?     (a) fan ON (b) fan OFF
  12. 12.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 450 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  13. 13.🤖 if (light < 200 AND 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
  14. 14.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 75. 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 170 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  16. 16.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  17. 17.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 41 %. What happens?     (a) pump ON (b) pump OFF
  18. 18.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 19 %. What happens?     (a) pump ON (b) pump OFF
  19. 19.🤖 if (light < 300 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
  20. 20.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 7 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  21. 21.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 31 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  22. 22.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 23 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  23. 23.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 89. What happens?     (a) lamp OFF (b) lamp ON
  24. 24.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  25. 25.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  26. 26.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 80 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  27. 27.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 32 °C. What happens?     (a) fan ON (b) fan OFF
  28. 28.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 17 °C. What happens?     (a) fan OFF (b) fan ON
  29. 29.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 39 °C. What happens?     (a) fan OFF (b) fan ON
  30. 30.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  31. 31.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 472. What happens?     (a) lamp ON (b) lamp OFF
  32. 32.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  33. 33.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 42 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  34. 34.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 44 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  35. 35.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 69. What happens?     (a) red LED ON (b) green LED ON
  36. 36.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 390 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  37. 37.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 470 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  38. 38.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 11 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  39. 39.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  40. 40.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 23 °C. What happens?     (a) fan ON (b) fan OFF

Answer key

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

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