The potential difference across the terminals of a battery is 8.5V when a current of 5A flows through it from the negative terminal to the positive terminal. When a current of 4A flows throgh it in the opposite direction, the terminal potential difference of the battery is 10V. Find the emf and the enternal resistance of the battery.

The potential difference across the terminals of a battery is 8.5V whe

1.	The potential difference across the terminals of a battery is 8.5V when a current of 5A flows through it from the negative terminal to the positive terminal. When a current of 4A flows throgh it in the opposite direction, the terminal potential difference of the battery is 10V. Find the emf and the enternal resistance of the battery.
Answer» Solution :`E-5r=8.5V``RARR` (1) `E+4r=10V``rarr` (2) from (1) and (2),`r = 0.167 omrga` substitute in (2),we GET E = 9.3V`

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