The current flowing through the conductor is directly proportional to potential difference and rules of series and parallel combination are mostly used to analyze simple circuits with more than one resistance. BUT in many other cases , we have more than resistance which makes a complex circuit ,to study that phenomena we have kirchhoff's rule.
Which can be simple defined as sum of all current meeting at a point is zero i.e suppose you have currents move in four directions but they meet a point , just like nerves of human system.
We know that when a current move towards the point, the current is taken as positive
And when the current is moving away from the point, it is taken as negative.
So now we move towards kirchhofs second rule i.e sum of potential change in a closed circuit is zero
Suppose that we have two values of current . One is greater than the other which means when the current suppose A Is passes through A1 it is moving from low to high potential and when current B movng through B1 lose some energy because it is passing from high to low potential.
And when it passes from low to high potential it gains some
energy.
As we know in this case both the values counter each other and their sum would be zero
So the conclusion that we can make is if an emf moves from - to + terminal potential is + Whereas when it moves from + to - potential is negative
Which can be simple defined as sum of all current meeting at a point is zero i.e suppose you have currents move in four directions but they meet a point , just like nerves of human system.
We know that when a current move towards the point, the current is taken as positive
And when the current is moving away from the point, it is taken as negative.
So now we move towards kirchhofs second rule i.e sum of potential change in a closed circuit is zero
Suppose that we have two values of current . One is greater than the other which means when the current suppose A Is passes through A1 it is moving from low to high potential and when current B movng through B1 lose some energy because it is passing from high to low potential.
And when it passes from low to high potential it gains some
energy.
As we know in this case both the values counter each other and their sum would be zero
So the conclusion that we can make is if an emf moves from - to + terminal potential is + Whereas when it moves from + to - potential is negative
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