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![[Post New]](/templates/default/images/icon_minipost_new.gif) 24 Aug 2008 13:49:03 IST
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when a battery is shortcircuited why ? v=E
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24 Aug 2008 14:07:37 IST
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a battery is short-circuited when both the terminals (positive and negative) of the battery are at the same potential
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25 Aug 2008 01:51:06 IST
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when battery is short circuited, its internal resistance is zero. hence v=E
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25 Aug 2008 09:21:57 IST
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Rather it is like this
When the resistance across the battery is zero, we say that the battery is short-circuited. Maximum current flows when the battery is short-circuited.
Alternatively, if no current is drawn from the supply, the output voltage V and the EMF E of the battery are equal.
We can again show this idea mathematically by using the equation as below:
E = V + Ir
If no current is drawn from the supply I = 0 so Ir = 0
Therefore E = V
The EMF of the supply is equal to the output p.d. when no current is being supplied.
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