Download App

14. Semicondutor electronics — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics14. Semicondutor electronics1 Mark
MCQ
Why is there a sudden increase in current in Zener diode ?
  • ✓
    due to rupture of bonds
  • B
    resistance of depletion layer becomes less
  • C
    due to high doping
  • D
    none of the above
✓

Answer

Correct option: A.
due to rupture of bonds
a
When Zener diode is connected in reverse bias, as applied voltage reaches at Zener breakdown voltage, due to rupture of bonds there is a sudden increase in current in Zener diode.

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

More "M.C.Q (1 Marks)" from 14. Semicondutor electronics→14. Semicondutor electronics — all question types→Physics STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

Electric field intensity at a point in between two parallel sheets with like charges of same surface charge densities $(\sigma )$ is
→
An object can be negatively charged by:
→
$A$ beam of light consisting of two wavelength $6300\, Å$ and $\lambda\, Å$ is used to obtain interference fringes in a Young's double slit experiment. If $4^{th}$ bright fringe of $6300\, Å$ coincides with $5^{th}$ dark fringe of $\lambda\, Å$, the value of $\lambda$ (in $Å$) is
→
Assertion: The refractive index of diamond is $\sqrt{6}$ and that of liquid is $\sqrt{3}$. If the light travels from diamond to the liquid, it will totally reflected when the angle of incidence is $30^{\circ}$.
Reason : $\mu=\frac{1}{\sin C^{\prime}}$ where $m$ is the refractive index of diamond with respect to liquid.
→
The ratio of intensities of two waves are given by $4 : 1.$ The ratio of the amplitudes of the two waves is
→
In a Young's double slit experiment, the slits are 2 mm apart and are illuminated with a mixture of two wavelength $\lambda_0=750 \mathrm{~nm}$ and λ = 900 nm. The minimum distance from the common central bright fringe on a screen 2m from the slits where a bright fringe from one interference pattern coincides with a bright fringe from the other is
→
A rod of legth l rotates with a uniform angular velocity $\omega$ about its perpendicular bisector. A uniform magnetic field B exists parallel to the axis of rotation. The potential difference between the two ends of the rod is:
→
At any instant the ratio of the amount of radioactive substances is $2 : 1$. If their half lives be respectively $12$ and $16$ hours, then after two days, what will be the ratio of the substances
→
The magnetic force acting on charged particle of charge $2\,\mu C$ in magnetic field of $2\, T$ acting in $y-$ direction , when the particle velocity is $\left( {2\hat i + 3\hat j} \right) \times {10^6}\,m{s^{ - 1}}$ is
→
Fission of nuclei is possible because the binding energy per nucleon in them
→