MCQ
To obtain electrons as majority charge carriers in a semiconductor, the impurity mixed is
  • A
    Monovalent
  • B
    Divalent
  • C
    Trivalent
  • Pentavalent

Answer

Correct option: D.
Pentavalent
d
To obtain electrons as majority charge carriers in a semiconductor, the impurity mixed is Pentavalent.

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

The given figure represents the phasor diagram of $a$ series $LCR $ circuit connected to an $ac$ source. At the instant $t'$ when the source voltage is given by $V = V_0cos\omega\, t'$, the current in the circuit will be
Equal volumes of two immiscible liquids of densities $\rho$ and $2\rho$ are filled in a vessel as shown in figure. Two small holes are punched at depth $h/ 2$ and $3h/2$ from the surface of lighter liquid. If $v_1 $ and $v_2 $ are the velocities of a flux at these two holes, then $v_1/v_2 $ is : 
A massless string is wrapped round a disc of mass $M$ and radius $R$. Another end is tied to a mass $m$ which is initially at height $h$ from ground level as shown in the fig. If the mass is released then its velocity while touching the ground level will be
The average density of Earth’s crust $10\ km$ beneath the surface is $2.7\ gm/cm^3$ . The speed of longitudinal seismic waves at that depth is $5.4\ km/s$ . The bulk modulus of Earth’s crust considering its behaviour as fluid at that depth is
The magnitude of electric force on $2\, \mu \,C$ charge placed at the centre $O$ of two  equilateral triangles each of side $10 \,cm$, as shown in figure is $P$. If charge $A, B, C, D, E$ and $F$ are $2\, \mu \,C, 2\, \mu \,C, 2\, \mu \,C,-2\, \mu \,C, -2\, \mu \,C, -2\, \mu \,C$   respectively, then $P$ is :.....$N$
A person used force $(F)$, shown in the figure to move a load with a constant velocity on a given surface Identify the correct surface profile
Consider a circle of radius $42\  cm$. An insect crawls with uniform speed of $1.3\  cm/s$ along the chord $AB$ then along the circular arc $BCD$ to reach point $D$ and then following cord $DA$ to reach finally $A$. Time spend by the insect to crawl from $A$ to $A$ is closest to    ......... $\sec$
A linear charge having linear charge density $\lambda$ , penetrates a cube diagonally and then it penetrate a sphere diametrically as shown. What will be the ratio of flux coming cut of cube and sphere
A source of light is placed in front of a screen. Intensity of light on the screen is $I.$ Two Polaroids ${P}_{1}$ and ${P}_{2}$ are so placed in between the source of light and screen that the intensity of light on screen is ${I} / 2 .$ ${P}_{2}$ should be rotated by an angle of ........  (degrees) so that the intensity of light on the screen becomes $\frac{3 I}{8}.$
As compared $^{12}C$ atom, $^{14}C$ atom has