Browse Questions

# Two identical batteries having emf 2.4 V and internal resistance 0.5$\Omega$ are connected as shown. Potential Difference between A and B is

$\begin {array} {1 1} (a)\;4.8V & \quad (b)\;2.4V \\ (c)\;1.2V & \quad (d)\;None\: of \: these \end {array}$

Can you answer this question?

The answer is clear if one has an understanding of what exactly is a non-ideal battery.
Here, two non-ideal batteries are connected in series and short circuited.
It is known that the potential difference across a shorted non-ideal battery is
$0 (V = E – ir = 0).$
Hence, the correct answer is 0 V.
Ans : (d)
answered Feb 6, 2014