Question

The terminal voltage of a battery is observed to fall when the battery supplies a current to an internal resisitor

Answer 1

Answer:

The terminal voltage of the battery is V terminal=ϵ−Ir. For a given emf and internal resistance, the terminal voltage decreases as the current increases due to the potential drop Ir of the internal resistance. Figure 10.2. 6: Schematic of a voltage source and its load resistor R.

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Answer 2

a closed circuit that is composed of a battery and a resistor. The voltage drop is due to the energy lost in the resistor, so if you apply Ohm's law you'll see a different value for the electromotive force (or voltage), comparing the open and closed circuits..                                                   The terminal voltage of the battery is V terminal=ϵ−Ir. For a given emf and internal resistance, the terminal voltage decreases as the current increases due to the potential drop Ir of the internal resistance.

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