Add a Resistor in Parallel Consider the following circuit. A 3rd light bulb will be added in parallel. Answer the following questions. What will happen to the reading on the ammeter? It will increase B. It will decrease C. It will remain the same D. Some other answer A. What was your reason? The resistance went up so less current B. More light bulbs so more current C. The battery remains the same so no change D. Some other answer A. What will happen to the brightness of each light bulb when the third one is added? It will remain the same. B. It will increase C. It will decrease D. Some other answer A.