The forward amplification factor of a transistor corresponds to

In transistor configurations, different parameters are used to describe amplification properties.

Forward amplification factor is denoted by α (alpha) and it represents the current gain in Common Base (CB) configuration.

It is defined as the ratio of collector current to emitter current:

α = Ic / Ie

The value of α is always less than 1 but very close to it (typically between 0.95 and 0.99).

Option A: Incorrect, because power gain of CE amplifier depends on both current and voltage gain, not on forward amplification factor.

Option C: Incorrect, because CC amplifier has a voltage gain nearly equal to 1, which is not related to forward amplification factor.

Option D: Incorrect, because voltage gain of CE amplifier is different and not defined by α.

Thus, the forward amplification factor of a transistor corresponds to the current gain of CB amplifier.