A battery has an internal resistance of

PHYSICS · Single correct · CBSE · Physics · Current Electricity · Current Electricity

Problem

A 12 V12\,\text{V} battery has an internal resistance of 1 Ω1\,\Omega. It is connected to a 5 Ω5\,\Omega external resistor. A switch connects a second 5 Ω5\,\Omega resistor in parallel with the first. Which of the following is closest to the terminal voltage of the battery immediately after the switch is closed? (a) 10 V10\,\text{V} (b) 6.0 V6.0\,\text{V} (c) 8.6 V8.6\,\text{V} (d) 12 V12\,\text{V}

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