What is the maximum current that can be drawn from a cell of emf and internal resistance connected to an external resistance ?
Step 1:Current drawn from a cell of emf and internal resistance in an external resistance is given by:
Step 2: for maximum current, the external resistance should be zero i.e., for maximum current the terminals of a cell must be short circuited. Substitute for in the formula of current.
Hence, the Maximum current is .