If you say the formula for power supply is also VI then I have one question.
Consider that I have two batteries. The power of a dc supply is always a constant. It means that when the current increases then Voltage should increase but total voltage always remains same (For example consider two circuits having different resistances( and hence different currents) will have have the same potential when each of them is connected to a battery).
I can't understand this. Please help me .
Thanks in advance.