A 85 V battery has an internal resistance of r = 5.73 ohms .
(a) What is the reading of a voltmeter having a resistance of R_v = 482 ohms when placed across the terminals of the battery?
(b) What maximum value may the ratio r/R_v have if the error in the reading of the emf of a battery is not to exceed 5.0%?
V_v= I_fs ( R_c +R_s)
The Attempt at a Solution
i dont know where to start, the only thing i have tried was drawing the diagram of the circuit. please offer input on where to start thank you in advance