I-V Characteristics of LED, Photodiode, Solar Cell and Zener Diode

Which of the following is/are correct

(i) The symbol  for zener diode is



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

Solar cells are made of $:$

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.

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.

The reading corresponding to zener diode are given below in the table. From given table, determine the reverse breakdown voltage of the zener diode.

Which of the characteristic curve are correct :

(A) Photo diode for ${\mathrm{I}}_2>{\mathrm{I}}_1$

(B) Solar cell

(C) L.E.D

The NOR gate is OR gate followed by 

Which of the following is not true in the uses of LEDs over conventional incandescent bulb.

Solar cell is a photodiode operated at

For the circuit shown below, the current through the Zener diode is :

In the given circuit the current through Zener Diode is close to

In the figure shown, the currents through the zener diode and load resistance are respectively

Three photodiodes $D_1, D_2$ and $D_3$ are made of semiconductors having band gaps of $2.6 \mathrm{eV}\text{,} 1.9 \mathrm{eV}$ and $3.2 \mathrm{eV}$, respectively. Which one will be able to detect light of wavelength of $6000 \mathrm{\AA }$?

To measure light intensity we use

Find the correct value of current ($i_1,i_2$ and $i_3$) in the circuit shown in the figure.

In the given circuit, the supply voltage is $V=15 \mathrm{volt}$. The $12 \mathrm{volt}, 0.36 \mathrm{watt},$ Zener-diode operates at a minimum diode current of $2 \mathrm{mA}$. Calculate the range over which load resistance $R_L$ can be varied.

In a photodiode the conductivity increases when light of wavelength less than $620 \mathrm{nm}$ is incident. The band gap is 

The correct symbol for Zener diode is :-