Wednesday 31 January 2018

electric circuits - Case where potential difference causes no current


why current will not flow from battery if I connect positive terminal of battery to ground even when there is potential difference



Answer





I connect positive terminal of battery to ground...


[The] negative terminal is not connected to anything.



If the negative terminal of the battery is not connected to anything, then no current can flow through the battery. Current can only flow around a complete circuit (i.e., it can only flow around a closed loop).


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