when a current of 0.5A is drawn from a cell, its terminal potential difference is 1.8V and when the current drawn is 1A, the terminal potential difference becomes 1.6V. Find the internal resistance and the emf of the cell.
When no current is drawn from a cell, the potential difference between the terminals of the cell is called
When the current is drawn from a cell in a closed circuit, the potential difference between the terminals of the cell is called: