A voltmeter is an instrument or machine which is used for measuring the electric potential difference between two points in an electric circuit.
Why does the voltmeter have high resistance?
The electrical potential difference between two points in an electrical circuit is measured using a voltmeter.
Digital voltmeters display the voltage via an analog-to-digital converter, while analog voltmeters change the pointer around a range in response to the circuit's voltage.
A voltmeter does not change the amount of current flowing between two places through the device; rather, it measures the difference in voltage between the two sites (for example, on opposing sides of a resistor).
As a result, it will have very high resistance, preventing current flow through it.
So, the voltmeter has very high resistance, since, it doesn't allow current to pass through it
