In a common emitter configuration, the parameters '
α ' (alpha) and '
β ' (beta) are related as follows:
α is the current gain in a common base configuration and
β is the current gain in a common emitter configuration. The relationships between '
α ' and '
β ' are given by:
β=and
α=Let's examine the given options one by one to determine the incorrect relation:
Option A:
=+1Rewriting this equation:
=+1This can be written as:
=Therefore, this is a correct relation.
Option
B:α=We know that:
α=Clearly,
does not match this, so this is the incorrect relation.
Option
C:α=We know that:
α=This is the correct relation.
Option D:
=−1Rewriting this equation:
=−1This can be written as:
= From the relation
β=, inverting both sides we get:
=Therefore, this is a correct relation.
In conclusion, the incorrect relation between '
α ' and '
β ' is Option
B:α=.