In a common emitter mode of a transistor, the `d.c.` current gain is 20, the emitter current is `7mA`. Calculate base current

For a transistor beta = 90. Find alpha . Find also the emitter current if the base current is 100muA .

In an n-p-n transistor the base current is due to 5% of the electrons reaching from emitter. The collector current is 9.5 mA. Then the emitter current (I_e) and the base current (I_b) respectively are

IN one n-p-n transistor the collector current is 10 mA and the base current is 1 mA and the emitter curretn is 11 mA. The values of alpha and beta respectivley are