Special Purpose p-n Junction Diodes

Which of the following is/are correct

(i) The symbol  for zener diode is



(ii) The reverse I – V characteristics of a zener diode.

The following $I–V$ characteristics. Curve is of a:

In Zener diode, for currents greater than the knee current, the V-I curve is almost straight line_____ to x-axis.

Explain V-I characteristics of zener diode?

What is the principle of working of solar cell.

What is field ionisation?

What is the optoelectronic junction devices $?$

Solar cells are made of $:$

Photo diode used in reverse bias condition.

LED is a forward bias p-n junction diode.

In a photodiode,

A Zener diode, having breakdown voltage equal to $15 \mathrm{V}$, is used in a circuit shown in the figure. If the applied voltage is $20 \mathrm{V}$, the current through the Zener diode is $x \mathrm{mA}$. The value of $x$ is

What is the order of the reverse saturation current before breakdown in a zener diode?

Solar cell is a photodiode operated at

Identify characteristics are given below, in the order (i), (ii), (iii), (iv):
i.        ii.

iii.      iv.

List some uses of solar cell.

Briefly explain the working of a solar cell.

What is Light emitting diode?

Which of the characteristic curve are correct.

$\left(\mathrm{A}\right)$ Photodiode for $I_2>I_1$

$\left(\mathrm{B}\right)$ Solar cell

$\left(\mathrm{C}\right)$ L.E.D.

Mention some advantages of LEDs over an incandescent lamp.