MCQ
Indium impurity in germanium makes
  • A
    $N-$ type
  • $P-$ type
  • C
    Insulator
  • D
    Intrinsic

Answer

Correct option: B.
$P-$ type
b
(b)Indium is trivalent, hence on doping with it, the intrinsic semiconductor becomes $P-$ type semiconductor.

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

Similar questions

Mark the correct statement :-
In the given reaction $_z{X^A}{ \to _{z + 1}}{Y^A}{ \to _{z - 1}}{K^{A - 4}}{ \to _{z - 1}}{K^{A - 4}}$ Radioactive radiations are emitted in the sequence
An electron enters a parallel plate capacitor with horizontal speed $u$ and is found to deflect by angle $\theta$ on leaving the capacitor as shown below. It is found that $\tan \theta=0.4$ and gravity is negligible. If the initial horizontal speed is doubled, then the value of $\tan \theta$ will be
A ray $\mathrm{OP}$ of monochromatic light is incident on the face $\mathrm{AB}$ of prism $\mathrm{ABCD}$ near vertex $\mathrm{B}$ at an incident angle of $60^{\circ}$ (see figure). If the refractive index of the material of the prism is $\sqrt{3}$, which of the following is (are) correct? $Image$

$(A)$ The ray gets totally internally reflected at face $CD$

$(B)$ The ray comes out through face $\mathrm{AD}$

$(C)$ The angle between the incident ray and the emergent ray is $90^{\circ}$

$(D)$ The angle between the incident ray and the emergent ray is $120^{\circ}$

An imaginary north pole of $10\,Am$ is rotating around an infinite long current carrying wire with $30\,revolution/min.$ on circular path. If current in wire is $5\,A$ then workdone in one second in doing so
A wooden cylinder floats vertically in water with half of its length immersed. The density of wood is
A horizontal bridge is built across a river. A student standing on the bridge throws a small ball vertically upwards with a velocity $4\,m s ^{-1}$. The ball strikes the water surface after $4\,s$. The height of bridge above water surface is $......\,m$ $\left(\right.$ Take $\left.g=10\,m s ^{-2}\right)$
The radius of a nucleus is given by $r_0 A^{1 / 3}$, where $r_0=1.3 \times 10^{-15} \,m$ and $A$ is the mass number of the nucleus. The lead nucleus has $A=206$. The electrostatic force between two protons in this nucleus is approximately ................ $N$
Solar energy is mainly caused due to
In an electromagnetic wave, the amplitude of electric field is $1 V/m.$  the frequency of wave is $5 \times {10^{14}}\,Hz$. The wave is propagating along $z-$ axis. The average energy density of electric field, in $Joule/m^3$, will be