1. The problem statement, all variables and given/known data How many coulombs of electricity pass through a lamp when a current of 5A flows for 3 minutes. Answer: 900C In this time 27,000 joules of electrical energy is converted into heat and light. How many joules of energy are supplied by each coulomb. 2. Relevant equations V=W/q E=Pt P=VI 3. The attempt at a solution 27000/900 = 30V P=30 x 5 = 150W E= 150 x 180 = 2700 Have I done this correctly?