GATE ECE Semiconductors PYQs & Answers

Home
GATE
Electronics and Communication Engineering
Topics
Semiconductors

Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.

Questions 1–3 of 3. Imported answers require independent review unless marked reviewed.

Topic practice 3 questionsPage 1 of 1

In a non-degenerate bulk semiconductor with electron density

, the value of

, where

and

denote the bottom of the conduction band energy and electron Fermi level energy, respectively. Assume thermal voltage as

and the intrinsic carrier concentration is

. For

, the closest approximation of the value of

, among the given options, is _________.

Your answerChoose one option.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Select the CORRECT statement(s) regarding semiconductor devices.

Your answerSelect all correct options. You can choose more than one.

Electrons and holes are of equal density in an intrinsic semiconductor at equilibrium.

Collector region is generally more heavily doped than Base region in a BJT.

Total current is spatially constant in a two terminal electronic device in dark under steady state condition.

Mobility of electrons always increases with temperature in Silicon beyond 300 K.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

-type semiconductor with zero electric field is under illumination (low level injection) in steady state condition. Excess minority carrier density is zero at

, where

cm is the diffusion length for electrons. Assume electronic charge,

C. The profiles of photo-generation rate of carriers and the recombination rate of excess minority carriers (

) are shown. Under these conditions, the magnitude of the current density due to the photo-generated electrons at

is ________ mA/cm

(rounded off to two decimal places).

Diagram for Electronics and Communication Engineering question 56

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

GATE ECE Semiconductors PYQs

How to practice Semiconductors

Question 17

Question 47

Question 56