Homework Statement
A torch bulb is marked 2.5V and 0.3A. When it is connected to a dry battery of e.m.f 3.0V the correct p.d of 2.5V is produced across it. Calculate the internal resistance if the battery.Homework Equations
I=V/R?The Attempt at a Solution
It's on paper - sorry!Answer = 1.67 -...