MCQ
$NPN$ transistor are preferred to $PNP$ transistor because they have
  • A
    Low cost
  • B
    Low dissipation energy
  • C
    Capability of handing large power
  • Electrons having high mobility than holes

Answer

Correct option: D.
Electrons having high mobility than holes
d
(d) In npn transistors electrons are majority charge carriers and in pnp transistors holes are majority charge carriers. Electrons have high mobility than holes and hence high mobility of energy.

Hence, $n-p-n$ transistors are preferred than $p-n-p$ transistors.

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

Calculate energy needed for moving a mass of $4\,\,kg$ from the centre of the earth to its surface (in joule), if radius of the earth is $6400\,\, km$ and acceleration due to gravity at the surface of the earth is $g = 10 \,\,m/sec^2.$
$\frac{x}{x+4}$ is the ratio of energies of photons produced due to transition of an electron of hydrogen atom from its

$(i)$ third permitted energy level to the second level and $(ii)$ the highest permitted energy level to the second permitted level. The value of $x$ will be.

Four charges equal to $-Q$ are placed at the four corners of a square and a charge $q$ is at its centre. If the system is in equilibrium the value of $q$ is
If the value of potential in an $ac$, circuit is $10V$, then the peak value of potential is
A metal wire has mass $(0.8 \pm 0.001) g$, radius $(0.3 \pm 0.002) mm$ and length $(5 \pm 0.04) cm$. The maximum possible percentage error in the measurement of density will nearly be:
A $10 H.P. $ motor pumps out water from a well of depth $20m$ and fills a water tank of volume $22380 $ $litres $ at a height of $ 10m$  from the ground. the running time of the motor to fill the empty water tank is ........... $\mathrm{minutes}$ $(g = 10m{s^{ - 2}}$)
A metallic ring connected to a rod oscillates freely like a pendulum. If now a magnetic field is applied in horizontal direction so that the pendulum now swings through the field, the pendulum will
A cube of side $I$ is placed in a uniform electric field $E=E \hat{i}$. The net electric flux through the cube is
In the figure shown, the image of a real object is formed at point $I$. $AB$ is the principal axis of the mirror. The mirror must be :
Auniform rod rotating in gravity free region with certain constant angular velocity. The variation of tensile stress with distance $x$ from axis of rotation is best represented by which of the following graphs.