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led - How to calculate how long a 9V battery will last based on schematic? - Electrical Engineering Stack Exchange
![Why is the ampmeter saying 10 mA? The battery is 9V and the resistor is 500 ohms. When I calculate the current the formula (I = V/R), I don't get that value. : Why is the ampmeter saying 10 mA? The battery is 9V and the resistor is 500 ohms. When I calculate the current the formula (I = V/R), I don't get that value. :](https://preview.redd.it/9vntzxtj78o91.jpg?auto=webp&s=8604c7ae96a162880a20474da5fa0f8fff68ed69)
Why is the ampmeter saying 10 mA? The battery is 9V and the resistor is 500 ohms. When I calculate the current the formula (I = V/R), I don't get that value. :
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