Which pin is used to read an analog value in the provided example?

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Multiple Choice

Which pin is used to read an analog value in the provided example?

Explanation:
Reading an analog value comes from using an analog-capable pin, which feeds the microcontroller’s ADC. In the provided example, the sensor is wired to the pin labeled A3, so the code reads from that channel (typically using analogRead(A3)). This returns a 10-bit value (0–1023) that represents the input voltage on that pin, scaled to the board’s reference voltage (usually 0–5V or 0–3.3V). D11 is a digital pin, not suitable for direct analog readings, so it wouldn’t capture an analog voltage. The other analog pins (A1, A2) could read analog values if the sensor were connected there, but the example specifically uses A3, making it the correct pin in that context.

Reading an analog value comes from using an analog-capable pin, which feeds the microcontroller’s ADC. In the provided example, the sensor is wired to the pin labeled A3, so the code reads from that channel (typically using analogRead(A3)). This returns a 10-bit value (0–1023) that represents the input voltage on that pin, scaled to the board’s reference voltage (usually 0–5V or 0–3.3V).

D11 is a digital pin, not suitable for direct analog readings, so it wouldn’t capture an analog voltage. The other analog pins (A1, A2) could read analog values if the sensor were connected there, but the example specifically uses A3, making it the correct pin in that context.

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