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15-04-2024
Physics

contestada

A battery with EMF 90 V has internal resistance Rb=8.52Ω
What is the reading Vv of a voltmeter having total resistance Rv=455 Ω
when it is placed across the terminals of the battery?
What is the maximum value that the ratio Rb/Rv may have if the percent error in the reading of the EMF of a battery is not to exceed
5.0% ?

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