MCQ
Which one of the following statement is false?
  • A
    Pure $Si$ doped with trivalent impurities gives a $p-$ type semiconductor.
  • Majority carriers in a $n-$ type semiconductor are holes.
  • C
    Minority carriers in a $p-$ type semiconductor are electrons.
  • D
    The resistance of intrinsic semiconductor decreases with increase of temperature.

Answer

Correct option: B.
Majority carriers in a $n-$ type semiconductor are holes.
b
In an-type semiconductors, electrons are majority carriers and holes are minority carriers.

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

Ultraviolet light of wavelength 300 nm and intensity $1.0 \mathrm{watt} / \mathrm{m}^2$ falls on the surface of a photosensitive material. If 1% of the incident photons produce photoelectrons, then the number of photoelectrons emitted from an area of $1.0 \mathrm{~cm}^2$ of the surface is nearly
A wavefront is an imaginary surface where:
The power dissipated in the circuit shown in the figure is $30\, Watts$. The value of $R$ is ............. $\Omega$
The figure gives the electric potential $V$ as a function of distance through five regions on $x$-axis. Which of the following is true for the electric field $E$ in these regions
A long solenoid is fabricated to closely winding wire of radius $0.5\,mm$ over a cylindrical frame so that the successive turns nearly touch each other, the magnetic field at the centre of solenoid if it carries a current of $5\,A$
A lens of large focal length and large aperture is best suited as an objective of an astronomical telescope since :
A wire carrying current $I$ is bent in the shape $A\,B\,C\,D\,E\,F\,A$ as shown, where rectangle $A\,B\,C\,D\,A$ and $A\,D\,E\,F\,A$ are perpendicular to each other. If the sides of the rectangles are of lengths $a$ and $b,$ then the magnitude and direction of magnetic moment of the loop $A\,B\,C\,D\,E\,F\,A\,$ is
In the figure shown, the effective capacitance between the points $A$ and $B$, if each has capacitance $C$, is
Two long parallel wires whose centres are $a$ distance $d$ apart carry equal currents in opposite directions. If the flux within wires is neglected, the inductance of such arrangement of wire of length $l$ and radius $a$ will be
A lamp is hanging at a height of $4\,m$ above a table. The lamp is lowered by $1\,m$. The percentage increase in illuminace will be.....$\%$