The transistor has a collector current of 2 mA. If the current gain is 135, what is the base current? A. 14.8 µA B. 10.3 µA C. 7.8 µA D. 7.75 µA E. None of the above

The correct answer is A. 14.8 µA.

The current gain of a transistor is the ratio of the collector current to the base current. In this case, the current gain is 135, so the collector current is 135 times the base current. The collector current is 2 mA, so the base current is 2 mA / 135 = 14.8 µA.

Option B is incorrect because it is the collector current divided

by the current gain. Option C is incorrect because it is the collector current divided by 100. Option D is incorrect because it is the collector current divided by 1000. Option E is incorrect because it is not a valid answer.