In a bipolar junction transistor

all the three regions (the emitter, the base and the collector) have equal concentrations of impurity
the emitter has the least concentration of impurity
the collector has the least concentration of impurity
the base has the least concentration of impurity

Correct Answer: the base has the least concentration of impurity

Explanation:

In terms of concentration of impurity (a.k.a impurity doping concentration, often abbreviated to doping concentration), from the highest to the lowest among the three regions of a bipolar junction, emitter, collector, and base are the correct order. The above order is independent of the type of BJT, npn or pnp

← Previous Question Next Question→

More Questions from Physics

The pressure exerted by a 760 mm column of mercury at 0° C is known as
Which one of the following physical quantities has the same dimensions as that of Planck’s constant h?
Which one of the following statements is not correct?
In total internal reflection, the light travel from
The energy of a photon, whose momentum is 10 MeV/c, where c is the speed of light, is given by
Liquids and gases never show
Light travels in a straight line (rectilinear propagation of light). This statement does hold if the medium of travel for light is
Two identical solid pieces, one of gold and other of silver, when immersed completely in water exhibit equal weights. When weighed in air (given that density of gold is greater than that of silver)
If the wavelengths corresponding to ultraviolet, visible and infrared radiations are given as lUV, lVIS and lIR respectively, then which of the following gives the correct relationship among these wavelengths?
An electron and a proton starting from rest get accelerated through potential difference of 100kV. The final speeds of the electron and the proton are Ve and Vp respectively. Which of the following relations is correct?

Discussion & Comments

No comments yet. Be the first to comment!

Join Discussion