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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 997 · 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 < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 228. What happens?     (a) lamp OFF (b) lamp ON
  2. 2.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 410. What happens?     (a) lamp ON (b) lamp OFF
  3. 3.🤖 “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
  4. 4.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  5. 5.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 21 °C. What happens?     (a) fan OFF (b) fan ON
  6. 6.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  7. 7.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 340 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  8. 8.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 37 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  9. 9.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  10. 10.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 393. What happens?     (a) lamp OFF (b) lamp ON
  11. 11.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) neither part (b) the if part (c) both parts (d) the else part
  12. 12.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  13. 13.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 49 %. What happens?     (a) pump ON (b) pump OFF
  14. 14.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 561. What happens?     (a) lamp ON (b) lamp OFF
  15. 15.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  16. 16.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 5 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  17. 17.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 33 °C. What happens?     (a) fan OFF (b) fan ON
  18. 18.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  19. 19.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 89. What happens?     (a) red LED ON (b) green LED ON
  20. 20.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 26 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  21. 21.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 60 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  22. 22.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 14 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  23. 23.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 31 %. What happens?     (a) pump OFF (b) pump ON
  24. 24.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 85. What happens?     (a) red LED ON (b) green LED ON
  25. 25.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 17 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  26. 26.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 53. What happens?     (a) red LED ON (b) green LED ON
  27. 27.🤖 if (temperature > 34) { 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
  28. 28.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  29. 29.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 98. What happens?     (a) red LED ON (b) green LED ON
  30. 30.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 227. What happens?     (a) lamp OFF (b) lamp ON
  31. 31.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 11 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  32. 32.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 70. What happens?     (a) green LED ON (b) red LED ON
  33. 33.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 230 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  34. 34.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 429. What happens?     (a) lamp OFF (b) lamp ON
  35. 35.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 21 °C. What happens?     (a) fan ON (b) fan OFF
  36. 36.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  37. 37.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 78. What happens?     (a) green LED ON (b) red LED ON
  38. 38.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  39. 39.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 42. What happens?     (a) red LED ON (b) green LED ON
  40. 40.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Warm (b) Cool (c) Hot

Answer key

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

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