a cell has an emf of 2.0 volt and an internal resistance of 0.1 ohm. what is the potentioal difference across its terminal when it is supplying a current of 5 A?
what is the maximum current the cell can supply?

Question

a cell has an emf of 2.0 volt and an internal resistance of 0.1 ohm. what is the potentioal difference across its terminal when it is supplying a current of 5 A? 
what is the maximum current the cell can supply?

souvik · Answer

use this...V=E-Ir
E=emf
V=potential difference across its terminal
I=current
r=internal resistance

anonymous · Answer

thanks

chenping · Answer

Emf=V+Ir
I=5A   r=0.1ohm   Emf=2V
Thus, V=2-.5=1.5V

anonymous · Answer

The max current that can be supplied is given by
I = E/r
It is when there is no ext resistance in the circuit. It is called the short circuit current.