Now for this case when the voltmeter is not a ideal one, a small current is flowing. The voltmeter reading equal to the potential difference across itself (10V) and not emf of the battery(12V) . This happens because there is current flowing through the whole circuit, causing IR to exist across every component with resistance. Now if the resistance of the voltmeter approaches infinity meaning approaching an ideal voltmeter, it that the voltmeter reading approaches emf of the cell and theoretically at infinity it should show emf of the cell exactly right?? and for the same instant, the potential difference across the resistor 10 kΩ should decrease until finally it reaches zero. Is this true?? Thank you very much or your guiding.