5+ Year Member
7+ Year Member
Jul 5, 2011
Medical Student (Accepted)

The explanation sucks..
P = (I^2)R

Since the current stays the same:
P1 = 60 W = I^2*R1
P2 = 100 W = I^2 *R2

So if R1 = 30 ohms for example and R2 = 25 ohms for example; but the current is the same throughout the circuit and each bulb, then the actual power going through the lower powered bulb is higher than 60 W?... I'm just confused by the wording of the explanation in terms of the math.


In series:
V=V1 + V2
I = I1 = I2
R= R1+R2

Help. -_-
Last edited:
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