Question
To obtain a $P-$type germanium semiconductor, it must be doped with
✓
Answer
(c)For$P - $type semiconductor the doping impurity should be trivalent.
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
Similar questions
Compare the dispersive powers of two prisms if one of them deviates the blue and red rays through $10^{\circ}$ and $6^{\circ}$ respectively and the second prism through $8^{\circ}$ and $4.5^{\circ}$
→Two objects are thrown up at angles of $45^{\circ}$ and $60^{\circ}$ respectively, with the horizontal. If both objects attain same vertical height, then the ratio of magnitude of velocities with which these are projected is .........
→A particle of mass $m = 1.67 \times 10^{-27}\, kg$ and charge $q = 1.6 \times 10^{-19} \, C$ enters a region of uniform magnetic field of strength $1$ $tesla$ along the direction shown in the figure. the particle leaves the magnetic field at point $D,$ then the distance $CD$ is :-
→A particle of charge $Q$ and mass $M$ moves in a circular path of radius $R$ in a uniform magnetic field of magnitude $B$. The same particle now moves with the same speed in a circular path of same radius $R$ in the space between the cylindrical electrodes of the cylindrical capacitor. The radius of the inner electrode is $R/2$ while that of the outer electrode is $ 3R/2.$ Then the potential difference between the capacitor electrodes must be
→In Young's double slit experiment, the two slits act as coherent sources of equal amplitudeAand wavelength $\lambda$ . In another experiment with the same setup the two slits are sources of equal amplitudeAand wavelength $\lambda$ but are incoherent. The ratio of the intensity of light at the midpoint of the screen in the first case to that in the second case is
→The potential energy of a system increases if work is done
Two loops $P$ and $Q$ are made from a uniform wire. The radii of $P$ and $Q$ are ${r_1}$ and ${r_2}$ respectively, and their moments of inertia are ${I_1}$ and ${I_2}$ respectively. If $\frac{{{l_2}}}{{{l_1}}}$ = $4$ then $\frac{{{r_2}}}{{{r_1}}}$ equals
→A ray of light travelling inside a rectangular glass block of refractive index $\sqrt 2 $ is incident on the glass-air surface at an angle of incidence of $45°$. The refractive index of air is $1.$ Under these conditions the ray
→By what percentage will the transmission range of a $TV$ tower be affected when the height of the tower is increased by $21 \%$ ?
→For the given circuit the current $i$ through the battery when the key in closed and the steady state has been reached is .....$A$
→