An auto mechanic needs to determine the emf and internal resistance of an old battery. He performs two measurements: in the first, he applies a voltmeter to the battery's terminals and reads 11.7 V; in the second, he applies an ammeter to the terminals and reads 17.1 A. What are the battery's emf and internal resistance?

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A: Given: Reading on voltmeter = 11.8 V Reading on ammeter = 19.5 A

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A: V1  = 3.9167 V V⁠⁠⁠⁠⁠⁠⁠2 = 2.611 V V3  = 5.222 V V4 = 7.833 VExplanation:

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Q: An auto mechanic needs to determine the emf and internal resistance of an old battery. He performs…

A: Emf=11.8v Current=17.7A

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