1

GATE ECE 1993

MCQ (More than One Correct Answer)

+2

-0.6

The built-in potential (Diffusion Potential) in a p-n junction

2

GATE ECE 1992

MCQ (Single Correct Answer)

+2

-0.6

The 6 V Zener diode shown in figure has zero Zener resistance and a knee current
of 5 mA. The minimum value of R, so that the voltage across it does not fall below
6 V is:

3

GATE ECE 1991

MCQ (Single Correct Answer)

+2

-0.6

The small signal capacitances of an abrupt P

^{+}−N junction is 1 nF at zero bias. If the built-in voltage is 1 volt, the capacitance at a reverse bias voltage of 99 volts is equal to4

GATE ECE 1991

Numerical

+2

-0

Referring to the figure. The switch S is in position 1 initially and steady state
conditions exist from time t = 0 to t = t

_{0}. At t = t_{0}, the switch is suddenly thrown into position 2. The current I through the 10K resistor as a function of time t, from t = 0 is (in mA) _____________.(Give the sketch showing the magnitudes of the current at t = 0,
t = t_{0} and t = $$\infty$$ )

Your input ____

Questions Asked from PN Junction (Marks 2)

Number in Brackets after Paper Indicates No. of Questions

GATE ECE 2017 Set 2 (1)
GATE ECE 2016 Set 3 (1)
GATE ECE 2016 Set 2 (1)
GATE ECE 2015 Set 3 (1)
GATE ECE 2015 Set 1 (1)
GATE ECE 2014 Set 2 (1)
GATE ECE 2013 (1)
GATE ECE 2009 (1)
GATE ECE 2007 (1)
GATE ECE 2005 (2)
GATE ECE 2003 (2)
GATE ECE 1993 (1)
GATE ECE 1992 (1)
GATE ECE 1991 (2)
GATE ECE 1987 (1)

GATE ECE Subjects

Signals and Systems

Representation of Continuous Time Signal Fourier Series Discrete Time Signal Fourier Series Fourier Transform Discrete Time Signal Z Transform Continuous Time Linear Invariant System Transmission of Signal Through Continuous Time LTI Systems Discrete Time Linear Time Invariant Systems Sampling Continuous Time Signal Laplace Transform Discrete Fourier Transform and Fast Fourier Transform Transmission of Signal Through Discrete Time Lti Systems Miscellaneous Fourier Transform

Network Theory

Control Systems

Digital Circuits

General Aptitude

Electronic Devices and VLSI

Analog Circuits

Engineering Mathematics

Microprocessors

Communications

Electromagnetics