(r. 1. +r. 2. +r. 3. )-IR =? how you get inside a battery.?. There are three ways to arrive at the equation relating emf, terminal pd, current and internal resistance. .
1 = 1/3 + 1/3 + 1/3 1 = 0.333... + 0.333... + 0.333... (... means repeated) 1 = 0.999... Step 1: a and b > 0 Step 2: a = b Step 3: a2 = ab Step 4: a2 - b2 = ab - b2 Step 5: (a + b)(a - b) = b(a - b) Step 6: (a + b) = b Step 7: b + b = b Step 8: 2b = b Step 9: 2 = 1