GATE ECE 1991 | Semiconductor Physics Question 51 | Electronic Devices and VLSI

GATE ECE 1991

MCQ (Single Correct Answer)

-0.6

A silicon sample is uniformly doped with 10¹⁶ phosphorous atoms/cm³ and 2 ×10¹⁶ boron atoms/cm³. If all the dopants are fully ionized, the material is

n-type with carrier concentration of 10¹⁶/cm³

p-type with carrier concentration of 10¹⁶/cm³

p-type with carrier concentration of 2 ×10¹⁶/cm³

n-type with carrier concentration of 2 ×10¹⁶/cm³

GATE ECE 1987

MCQ (More than One Correct Answer)

-0

In an intrinsic semiconductor the free electron concentration depends on

Effective mass of electrons only.

Effective mass of holes only.

Temperature of the Semiconductor.

Width of the forbidden energy band of the semiconductor.

GATE ECE Subjects

Network Theory

Network Elements Network Theorems Transient Response Sinusoidal Steady State Response Two Port Networks Network Graphs State Equations For Networks Miscellaneous

Control Systems

Basic of Control Systems Signal Flow Graph and Block Diagram Time Response Analysis Stability Root Locus Diagram Frequency Response Analysis Compensators State Space Analysis

Electronic Devices and VLSI

PN Junction Semiconductor Physics IC Basics and MOSFET BJT and FET

Analog Circuits

Diodes Bipolar Junction Transistor Frequency Response FET and MOSFET Oscillators Operational Amplifier Feedback Amplifier Power Amplifier 555 Timer

Digital Circuits

Number System and Code Convertions Boolean Algebra Logic Gates Combinational Circuits Sequential Circuits Semiconductor Memories Logic Families Analog to Digital and Digital to Analog Converters

Microprocessors

Pin Details of 8085 and Interfacing with 8085 Instruction Set and Programming with 8085

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

Communications

Fundamentals of Information Theory Noise In Digital Communication Analog Communication Systems Digital Communication Systems Random Signals and Noise

Electromagnetics

Waveguides Antennas Miscellaneous Transmission Lines Maxwell Equations Uniform Plane Waves

General Aptitude

Verbal Ability Logical Reasoning Numerical Ability

Engineering Mathematics

Linear Algebra Calculus Vector Calculus Probability and Statistics Differential Equations Complex Variable Numerical Methods Transform Theory