Question

For a narrow PNP BJT, the excess minority carrier concentration $(\Delta n_E$ for emitter , $\Delta p_B$ for base , $\Delta n_C$ for collector) normalized to equilibrium minority carrier concentration $(n_{E_0}$ for emitter, $p_{B_0}$ for base , $n_{C_0}$ for collector ) in the quasi-neutral emitter, base and collector regions are shown below. Which one of the following biasing modes is the transistor operating in?

Answer 1

Ans : (c)

Emitter –base junction $\left(J_E\right)$ is in RB
Collector-base junction $\left(J_C\right)$ is in FB
Hence, inverse active mode.