Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 359 · 40 questions

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.

1. 1.🤖 if (moisture < 30) { pump ON } else { pump OFF }
   The soil moisture sensor reads 11 %. What happens? (a) pump ON (b) pump OFF
2. 2.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
   The light reading is 260 and motion is detected (true). What happens? (a) porch lamp OFF (b) porch lamp ON
3. 3.🤖 if (temperature > 28) { fan ON } else { fan OFF }
   The temperature sensor reads 20 °C. What happens? (a) fan ON (b) fan OFF
4. 4.🤖 “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
5. 5.🤖 if (temperature > 28) { fan ON } else { fan OFF }
   The temperature sensor reads 21 °C. What happens? (a) fan OFF (b) fan ON
6. 6.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
   The temperature is 38 °C. What is shown? (a) Warm (b) Hot (c) Cool
7. 7.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
   The light reading is 650 and motion is detected (true). What happens? (a) porch lamp OFF (b) porch lamp ON
8. 8.🤖 if (light < 300 AND 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
9. 9.🤖 if (temperature > 25) { fan ON } else { fan OFF }
   The temperature sensor reads 31 °C. What happens? (a) fan ON (b) fan OFF
10. 10.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 130 and motion is not detected (false). What happens? (a) porch lamp OFF (b) porch lamp ON
11. 11.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 23 °C. What happens? (a) fan ON (b) fan OFF
12. 12.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown? (a) Warm (b) Hot (c) Cool
13. 13.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown? (a) Warm (b) Cool (c) Hot
14. 14.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the else part (b) both parts (c) neither part (d) the if part
15. 15.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 634. What happens? (a) lamp ON (b) lamp OFF
16. 16.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 7 cm. What happens? (a) buzzer beeps (b) buzzer is silent
17. 17.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 58 %. What happens? (a) pump ON (b) pump OFF
18. 18.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 260 and motion is detected (true). What happens? (a) porch lamp ON (b) porch lamp OFF
19. 19.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 10 cm. What happens? (a) buzzer is silent (b) buzzer beeps
20. 20.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 4 cm. What happens? (a) buzzer beeps (b) buzzer is silent
21. 21.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 560 and motion is not detected (false). What happens? (a) porch lamp OFF (b) porch lamp ON
22. 22.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 45 %. What happens? (a) pump ON (b) pump OFF
23. 23.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 37 °C. What happens? (a) fan OFF (b) fan ON
24. 24.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 240. What happens? (a) lamp OFF (b) lamp ON
25. 25.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 290 and motion is not detected (false). What happens? (a) porch lamp OFF (b) porch lamp ON
26. 26.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 45 °C. What is shown? (a) Hot (b) Cool (c) Warm
27. 27.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 31 %. What happens? (a) pump ON (b) pump OFF
28. 28.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 45 °C. What is shown? (a) Warm (b) Cool (c) Hot
29. 29.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 640 and motion is not detected (false). What happens? (a) porch lamp ON (b) porch lamp OFF
30. 30.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 29 °C. What happens? (a) fan OFF (b) fan ON
31. 31.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 35 °C. What happens? (a) fan ON (b) fan OFF
32. 32.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 620 and motion is detected (true). What happens? (a) porch lamp OFF (b) porch lamp ON
33. 33.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 330 and motion is detected (true). What happens? (a) porch lamp ON (b) porch lamp OFF
34. 34.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 17 %. What happens? (a) pump ON (b) pump OFF
35. 35.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 31 °C. What happens? (a) fan ON (b) fan OFF
36. 36.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 79. What happens? (a) green LED ON (b) red LED ON
37. 37.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown? (a) Hot (b) Warm (c) Cool
38. 38.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 121. What happens? (a) lamp OFF (b) lamp ON
39. 39.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown? (a) Warm (b) Cool (c) Hot
40. 40.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 349. What happens? (a) lamp ON (b) lamp OFF

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