A battery with emf 900 volt has internal, Physics

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A battery with emf 900 volt has internal

A battery with EMF 90.0 Volt has internal resistance R_b = 9.50 ohm.

a) Determine what is the reading V_v of a voltmeter having total resistance R_v = 430 ohm when it is located across the terminals of the battery?

b) Find what is the maximum value that the ratio R_b/R_v may have if the percent error in the reading of the EMF of a battery is not to exceed 3.50 percent?

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