In common emitter amplifier, input resistance is $$1000 \Omega$$, peak value of input signal voltage is $$5 \mathrm{~mV}$$ and $$\beta=60$$. The peak value of output current is

When a small amount of impurity atoms are added to a semiconductor, then generally its resistivity

$V-I$ characterstics of LED is shown correctly by graph

Which of the following regions of a transistors are, respectively, heavily dopped and lightly dopped?