For Parralel Resistors, I1 = V/R1, I2 = V/R2 .........

1/Rt = 1/R1 + 1/R2 + ........

Rate of heat transfer = I^2 x R = P

emf ε = E/Q = IR + Ir (r being internal resistance)

Power supplied by a cell, Iε = (I^2 x R) + (I^2 x r)

Terminal pd, V = ε - Ir

Cell Current = cell emf / total circuit resistance

Pd across series resistors = current x resistance of each resistor

current through parralel resistors = pd across both / resistor's resistance

Terminal Pd across cells in series = ε - Ir/n (n being the no. of cells)

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