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the sum of currents into a node = the sum of currents exiting the node - kirchoffs first law
the sum of the emf equals the sum of the potential differences across a loop - kirchoffs second law
the emf is the voltage across a power supply
remember that when a wire splits into 2 parralel branches its current splits while the voltage stays the same
this is because voltage is a mesure of energy per unit of charge, which wouldn't change because each electron has the same charge.
the current splits because its a way of messuring the amount of charge flowing
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