Voltmeter: A voltmeter would be an instrument as well as a gadget that measures the voltage or potential difference throughout the endpoints or the terminals of a wire as well as an electrical device.
Whenever they connect the voltmeter device in parallel, the resistance should always be equivalent to infinity. As we are not changing this same voltage or current throughout the existing circuit
Hence high resistance will lead to no current
The current flow for such a perfect (ideal) voltmeter would be zero.
Therefore, the resistance of an ideal voltmeter will be infinite.