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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 172 · 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 (temperature > 34) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  2. 2.🤖 “if (A AND B)” is true when … (a) both are false (b) both A and B are true (c) only A is true (d) only B is true
  3. 3.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 33 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  4. 4.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 77. What happens?     (a) green LED ON (b) red LED ON
  5. 5.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  6. 6.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  7. 7.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  8. 8.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 32 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  9. 9.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 434. What happens?     (a) lamp OFF (b) lamp ON
  10. 10.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 290 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  11. 11.🤖 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
  12. 12.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 50 %. What happens?     (a) pump ON (b) pump OFF
  13. 13.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 18 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  14. 14.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 37 %. What happens?     (a) pump ON (b) pump OFF
  15. 15.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 480 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  16. 16.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 65. What happens?     (a) green LED ON (b) red LED ON
  17. 17.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  18. 18.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 37 %. What happens?     (a) pump ON (b) pump OFF
  19. 19.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  20. 20.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 21 °C. What happens?     (a) fan ON (b) fan OFF
  21. 21.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 50 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  22. 22.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 66. What happens?     (a) green LED ON (b) red LED ON
  23. 23.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 26 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  24. 24.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  25. 25.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 150 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  26. 26.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 20 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  27. 27.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 37 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  28. 28.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 620 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  29. 29.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 288. What happens?     (a) lamp ON (b) lamp OFF
  30. 30.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 30 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  31. 31.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 10 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  32. 32.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 63. What happens?     (a) lamp ON (b) lamp OFF
  33. 33.🤖 if (light < 300 OR 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
  34. 34.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  35. 35.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 215. What happens?     (a) lamp ON (b) lamp OFF
  36. 36.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 540 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  37. 37.🤖 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 ON (b) porch lamp OFF
  38. 38.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  39. 39.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 220 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  40. 40.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 37 cm. What happens?     (a) buzzer is silent (b) buzzer beeps

Answer key

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

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