3) Determine the base current density in the transistor if the base emittervoltage VBE is forward biased with 0.5 V. Assume the base and emitterlengths are shorter than the diffusion length. (4)...

3) Determine the base current density in the transistor if the base emitter voltage VBE is forward biased with 0.5 V. Assume the base and emitter lengths are shorter than the diffusion length. (4) Explain why current gain is higher in npn transistors than in pnp transistors.