1. The problem statement, all variables and given/known data I'm trying to find the internal resistance of a Voltmeter. The current is 0.212 mA which is measured by I. Rx is 7000 Ohms and the emf of the battery is 1.50 V. 2. Relevant equations V = IR so R = V/I 3. The attempt at a solution How can I start it off to find the Voltmeter's resistance? I don't know exactly to accomplish this. Any help would be appreciated.