Question

An Arduino Uno is configured with the voltage divider connected to Analog input pin AO as shown, and the code shown below is uploaded. What happens? testCodeA Arduino 1.8.11 Hourly Build 2019/10/29 11:12 Arduino testCodeA Uno #define LED 13 to SV 130 5ks § void setup() { pinMode(LED, OUTPUT); B toap ŹR 10 Kaş void loop 1 int voltage analogRead(AO); if (voltage > 1024/2) digitalWrite(LED, HIGH); else digitalWrite(LED, LOW); HOGNO Gong Done compiling Sketch uses 778 bytes (2%) of program storage space. Maximum is 32 Global variables use 9 bytes (0%) of dynamic memory, leaving 2039 Arduino/Genuino Uno on /dev/cu.usbmodem14101 O O O Select one: a. The LED blinks on and off at a 10 Hz b. The LED blinks on and off at a 1 Hz rate c. The LED stays on d. The LED stays off e. The LED turns on when bright light shines on the circuit o o

Answer 1

Option C is the right answer.Led always stays on.

This is because the voltage at A0 is $\frac{2*5}{3}$ which is greater than $\frac{5}{2}$ . Therefore if condition is true and the led will turn on. (In analogRead 5V is considered as 1024 units.)