Question

The AC current gain in a common base configuration is_________

(a) -∆IC/∆IE

(b) ∆IC/∆IE

(c) ∆IE/∆IC

(d) -∆IE/∆IC

The question was asked in unit test.

My question is from The Common Base Configuration in chapter Transistor Characteristics of Electronic Devices & Circuits

Answer 1

The correct choice is (a) -∆IC/∆IE

Best explanation: The AC current gain is denoted by αac. The ratio of change in collector current to the change in emitter current at constant collector base voltage is defined as current amplification factor.