In a transistor the base is made very thin. ExpIain the reason.

Explanation

The number density of majority carriers in the base region is low as it is lightly doped. When the emitter -base juncttion is forwed biased the majority charge carriers crossing emitter-base junction reaches base and results electron-hole recombination in the base region.Since it is thin and lightly doped only a small amount of electron -hole recombination takes place and rest of the majority charge carriers cross the barrier and produce an appreciable current in the collector circuit.