Final answer:
If you connect both probes of a voltmeter to one end of a 1.5-volt battery, you would read a voltage of 1.5 volts.
Step-by-step explanation:
In this scenario, if you connect both probes of a voltmeter to one end of a 1.5-volt battery, you would read a voltage of 1.5 volts. This is because the voltmeter measures the potential difference or voltage between two points in a circuit.
When both probes are connected to one end of the battery, the other end is at a reference potential of 0 volts. Therefore, the voltage measured by the voltmeter would be equal to the voltage of the battery.