Download App

Electronics — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsElectronics1 Mark
Question
Assertion : Semiconductors do not Obey's Ohm's law.
Reason : Current is determined by the rate of flow of charge carriers.
✓

Answer

(e) The assertion is not true. In fact, semiconductor Obeys Ohm's law for low values of electric field $(\sim 10 \cdot \mathrm{V} / \mathrm{m})$. Above this, the current becomes almost independent of electric field.

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 "Assertion & Reason" from Electronics→Electronics — all question types→JEE physics STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

Assertion : Cream gets separated out of milk when it is churned, it is due to gravitational force.
Reason : In circular motion gravitational force is equal to centripetal force.
→
Assertion : A spring has potential energy, both when it is compressed or stretched.
Reason : In compressing or stretching, work is done on the spring against the restoring force.
→
Assertion : In practical application, power rating of resistance is not important.
Reason : Property of resistance remain same even at high temperature.
→
Assertion : The internal energy of an isothermal process does not change.
Reason : The internal energy of a system depends only on pressure of the system.
→
Assertion : On a rainy day, it is difficult to drive a car or bus at high speed.
Reason : The value of coefficient of friction is lowered due to wetting of the surface.
→
Assertion : Environmental damage has increased the amount of ozone in the atmosphere.
Reason : Increase of ozone increases the amount of ultraviolet radiation on earth.
→
Assertion : The heat supplied to a system is always equal to the increase in its internal energy.
Reason : When a system changes from one thermal equilibrium to another, some heat is absorbed by it.
→
Assertion : For a perfectly diamagnetic substance permeability is always one.
Reason : The ability of a material of permit the passage of magnetic lines of force through it is called magnetic permeability.
→
Assertion : A null vector is a vector whose magnitude is zero and direction is arbitrary.
Reason $\quad$ : A null vector does not exist.
→
Assertion : If two protons are brought near one another, the potential energy of the system will increase.
Reason : The charge on the proton is $+1.6 \times 10^{-19} \mathrm{C}$.
→