Final answer:
When the base width of a bipolar transistor increases by a factor of two, the collector current will decrease by a factor of two.
Step-by-step explanation:
When the base width of a bipolar transistor increases by a factor of two due to a manufacturing error, the collector current will decrease by a factor of two.
This is because the base current is responsible for controlling the collector current in a transistor. A wider base width will lead to a decrease in the base current. Since the collector current is proportional to the base current, the collector current will decrease by the same factor.