Download App

STD 12 - 14. Semicondutor electronics — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 12 - 14. Semicondutor electronics4 Marks
MCQ
The incorrect statement about the property of a Zener diode is
  • A
    Zener voltage remains constant at breakdown
  • B
    It is designed to operate under reverse bias
  • ✓
    Depletion region formed is very wide
  • D
    $p$ and $n$ regions of zener diode are heavily doped
✓

Answer

Correct option: C.
Depletion region formed is very wide
c
For zener diode $\rightarrow$ Doping is high

Depletion region is thin

It is operated in Reverse Bias region

Zener voltage $\left( V _{ z }\right)$ is constant

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

NEET STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

When cathode rays (tube voltage $~ 10 kV$) collide with the anode of high atomic weight then we get
→
A uniform metal rod of $2\, mm^2$ cross section fixed between two walls is heated from $0\,^oC$ to $20\,^oC$. The coefficient of linear expansion of rod is $12\times10^{-6}/^oC$. Its Young's modulus of elasticity is $10^{11} \,N/m^2$. The energy stored per unit volume of rod will be ....... $J/m^3$
→
In a double slit experiment the angular width of a fringe is found to be $0.2^o $on a screen placed $1\, m$ away. The wavelength of light used is $600\, nm$. What will be the angular width of the fringe if the entire experiment apparatus is immersed in water? Take refractive index of water to be $4/3$.......$^o$
→
In the following sequence, products $\mathrm{I}, \mathrm{J}$ and $\mathrm{L}$ are formed. $\mathrm{K}$ represents a reagent.

$Image$

$1.$ The structure of the product $\mathrm{I}$ is

A,B,C,D,  $Image$

$2.$ The structures of compounds $J$ and $K$ respectively are

A,B,C,D,  $Image$

$3.$ The structure of product $L$ is

A,B,C,D,  $Image$

Give the answer question $1,2$ and $3.$

→
A vertical wire kept in $Z-X$ plane carries a current from $Q$ to $P$ (see figure). The magnetic field due to current will have the direction at the origin $O$ along
→
The figure shows the variation of photocurrent with anode potential for a photo-sensitive surface for three different radiations. Let $I_a, I_b$ and $I_c$ be the intensities and $f_a, f_b$ and $f_c$ be the frequencies for the curves $a, b$ and $c$ respectively.
→
For what value of the resistor $X$ will the equivalent resistance of the two circuits shown be the same?
→
A screw gauge has $50$ divisions on its circular scale. The circular scale is $4$ units ahead of the pitch scale marking, prior to use. Upon one complete rotation of the circular scale, a displacement of $0.5\, mm$ is noticed on the pitch scale. The nature of zero error involved, and the least count of the screw gauge, are respectively
→
A horizontal circular platform of radius $0.5 \ m$ and mass $0.45 \ kg$ is free to rotate about its axis. Two massless spring toy-guns, each carrying a steel ball of mass $0.05 \ kg$ are attached to the platfrom at a distance $0.25 \ m$ from the centre on its either sides along its diameter (see figure). Each gun simultaneously fires the balls horizontally and perpendicular to the diameter in opposite directions. After leaving the platfrom, the balls have horizontal speed of $9 \ ms ^{-1}$ with respect to the ground. The rotational speed of the platfrom in rad ${ }^{-1}$ after the balls leave the platform is
→
In a potentiometer experiment, the galvanometer shows no deflection when a cell is connected across $60\, cm$ of the potentiometer wire. If the cell is shunted by a resistance of $6\,\Omega $, the balance is obtained across $50\, cm$ of the wire. The internal resistance of the cell is .............. $\Omega $
→