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Math Asked by a SnapAndSolve user · about 1 hour ago

In an experiment to determine the properties of a car battery various loads were connected to the different...

In an experiment to determine the properties of a car battery various loads were connected to the different potential difference V across each load and the corresponding current I through the battery was recorded as displayed on the table below.
V/V | 16.6 | 15.2 | 12.0 | 9.6 | 7.8 | 6.6 | 5.2 | 3.8
I/mA | 4.0 | 8.0 | 16.8 | 25.8 | 32.0 | 36.0 | 40.0
Theory holds the potential difference V and current I vary according to the equation E = V + Ir

Answer

Explanation: The table provides values of potential difference (V) and current (I) for various loads connected to a car battery. The relationship between these quantities is given by the equation E = V + Ir, where E is the electromotive force (emf) of the battery and r is the internal resistance.

  1. To determine the emf (E) and internal resistance (r) of the battery, you can use the given data points to plot a graph of V against I. The y-intercept of the graph will give the emf (E), and the slope will give the negative of the internal resistance (-r).

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