Electronics and Communication Engineering
2022 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE ECE 2022 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 55–57 of 65. Imported answers require review unless explicitly marked reviewed.
Question 55
Open questionECNAT2 marksNeeds review
For a vector
, the 8-point discrete Fourier transform (DFT) is denoted by
, where
Here,
. If
and
, then the value of
is ________ (rounded off to one decimal place).Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 56
Open questionECNAT2 marksNeeds review
A
-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). 
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 57
Open questionECNAT2 marksNeeds review
A circuit and the characteristics of the diode (D) in it are shown. The ratio of the minimum to the maximum small signal voltage gain
is ________ (rounded off to two decimal places). 
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer