In this first formula is for equivalent resistance and second formula is for what - Physics - Electricity

Question

In this first formula is for equivalent resistance and second
formula is for what ??

Anshu Agrawal · Accepted Answer

Dear student,
The second equation is for the net power in series combination
Each of the resistors in a series circuit consumes power which is
dissipated in the form of heat Since this power must come from the
source, the total power must be equal to the power consumed by the
circuit resistances

Regards

In this first formula is for equivalent resistance and second formula is for what ??