MCQ
Intrinsic semiconductor is electrically neutral. Extrinsic semiconductor having large number of current carriers would be
  • A
    Positively charged
  • B
    Negatively charged
  • C
    Positively charged or negatively charged depending upon the type of impurity that has been added
  • Electrically neutral

Answer

Correct option: D.
Electrically neutral
d
(d)Extrinsic semiconductor ($N-$type or $P-$type) are neutral.

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

A freshly prepared sample of a radioisotope of half-life $1386 \ s$ has activity $10^3$ disintegrations per second. Given that In $2=0.693$, the fraction of the initial number of nuclei (expressed in nearest integer percentage) that will decay in the first $80 \ s$ after preparation of the sample is :
The opposition offered by the electrolyte of the cell to the flow of current through itself is known as $......$.
Two light beams of intensities $4\,I$ and $9\,I$ interfere on a screen. The phase difference between these beams on the screen at point $A$ is $zero$ and at point $B$ is $\pi$. The difference of resultant intensities, at the point $A$ and $B$, will be $....I$.
Two heater wires of equal length are first connected in series and then in parallel. The ratio of heat produced in the two cases is
A moving coil sensitive galvanometer gives at once much more deflection. To control its speed of deflection
Ray diagram for two lenses kept at some distance given in the diagram, which of the following option is correct $\left(f_1, f_2=\right.$ focal length, $d=$ distance between lenses $)$
In a series $R-L-C$ $AC$ circuit, for a particular value of $R, L$ and $C$ power supplied by the source is $P$ at resonance. If the value of inductance is halved, then the power from the  source again at resonance is $P'.$ Then :
Two concave lenses $L_1$ and $L_2$ are kept in contact with each other. If the space between the two lenses is filled with a material of refractive index $\mu\approx1,$ the magnitude of the focal length of the combination:
A plane electromagnetic wave of frequency $28 \,MHz$ travels in free space along the positive $x$-direction. At a particular point in space and time, electric field is $9.3 \,V / m$ along positive $y$-direction. The magnetic field (in $T$ ) at that point is
A conducting sphere of radius $10\, cm$ has unknown charge. If the electric field at a distance $20\, cm$ from the centre of the sphere is $1.2 \times 10^3\, N\, C^{-1}$ and points radially inwards. The net charge on the sphere is