"A voltmeter is connected to the terminals of the battery; the battery is not connected to any other external circuit elements. What is the reading of the voltmeter V?" The voltmeter should be measuring the potential difference between the positive and negative terminals of the battery, which should be the voltage of the battery (ie 9V, 12V). However the problem asks me to find V in volts to 3 sig figs (so I think I should be getting an actual number), but there is no information given about the voltage of the battery. How can I find the reading on the voltmeter?