MCQ
In a semiconductor:
- ✓There are no free electrons at $0 K.$
- BThere are no free electrons at any temperature.
- CThe number of free electrons increases with pressure.
- DThe number of fre electrons is more than that in a conductor.
✓
Answer
Correct option: A.
There are no free electrons at $0 K.$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
More "M.C.Q (1 Marks)" from Semiconductor Electronic: Material, Devices And Simple Circuits→Semiconductor Electronic: Material, Devices And Simple Circuits — all question types→Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→
Similar questions
A man cannot see clearly the objects beyond a distance of $20\, cm$ from his eyes. To see distant objects clearly he must use which kind of lenses and of what focal length
→Assertion : In photoemissive cell inert gas is used.
Reason : Inert gas in the photoemissive cell gives greater current.
Reason : Inert gas in the photoemissive cell gives greater current.
The resultant capacitance of given circuit is
The idea of matter waves was given by
In Bohr's model of the hydrogen atom, the ratio between the period of revolution of an electron in the orbit of $n=1$ to the period of revolution of the electron in the orbit $n=2$ is
→For which of the following particles will it be most difficult to experimentally verify the deBroglie relationship?
In the circuit shown the variable resistance is so adjusted that the ammeter reading is same in both the position $1$ and $2$ of the key. The reading of ammeter is $2A$. If $E = 20V$, then $x$ is :- ................... $\Omega$
→Two insulated charged spheres of radii $20\,cm$ and $25\,cm$ respectively and having an equal charge $Q$ are connected by a copper wire, then they are separated
→If a copper ring is moved quickly towards south pole of a powerful stationary bar magnet, then [
Calculate the current shown by the ammeter $A$ in the circuit diagram is .............. $A$
→