What is zener breakdown?

A general purpose diode is more likely to suffer avalanche breakdown rather than zener breakdown because

Two Zener diodes having specification 12V, 1/4W are connected in series. If breakdown voltage of each diode is 5V, then what is the breakdown voltage in the series combination of the diodes?

Zener breakdown occurs

The main cause of Zener breakdown is.

A zener diode has a contract potential of 0.8 V in the absence of biasing. It undergoes zener breakdown for an electric field of 10^(6) Vm^(-1) at the depletion region of p-n junction. If the width of the depletion region is 2-4mu m, what should be the reverse biased potential for the zener breakdown to occur?

In the figure there is a DC voltage regulator circuit, with a Zener breakdown voltage = 6V.If the unregulated input voltage varies between 10V to 16V,then what is the maximum Zener current?

If the voltage between the terminals A and B is 17V and zener breakdown voltage is 9V , then the potential across R is

What is the zener current in the following circuit ?

Respiration is the breakdown of