In an experiment,the saturation in the plate current in a diode is observed at $240\,V$. But a student still wants to increase the plate current. It can be done,if

$A$ waveform is applied to the following circuit. Assuming an ideal diode and ${R_1} = {R_2}$, which of the following output waveforms will be produced?

An electron in the $n$-region of a $p-n$ junction moves towards the junction with a speed of $5 \times 10^5 \ m/s$. If the barrier potential of the junction is $0.45 \ V$, then the speed with which the electron enters the $p$-region after penetration through the barrier is (Charge of the electron $e = 1.6 \times 10^{-19} \ C$ and mass of the electron $m = 9 \times 10^{-31} \ kg$).

In the case of forward biasing of a $PN-$junction,which one of the following figures correctly depicts the direction of flow of carriers?

Avalanche breakdown is due to

The magnitude of the diffusion current in a $p-n$ junction is smaller than the magnitude of the drift current: