IAE Academy

THE IAE ENGINEER’S BRIEF

ENGINEER'S BRIEF · 02Edition 02 · Instrumentation Engineering · September 2026 · v1.0 · facts checked 13 Sep 2026

GATE IN 2027 Syllabus: What Changed from 2026, Section by Section

Comparing the official 2026 and 2027 PDFs, the GATE IN 2027 syllabus newly lists items in all 10 sections, such as Bayes' theorem in Section 1 and permanent magnet synchronous machines in Section 3. Seven sections have items no longer listed by name, including three phase induction motors. Other changes move items between sections or change the wording attached to an item listed in both years.

The official GATE 2026 and GATE 2027 Instrumentation syllabus PDFs were compared section by section. Every entry quotes both documents, and a script checks each quote and each “not listed by name” claim against them.

Facts checked 13 September 2026

GATE IN 2027 syllabus: what changed from 2026, section by section

GATE IN 2027 syllabus: what changed from 2026, section by section
SectionNewly listed in 2027No longer listed in 2027Moved, or qualifier changed
Section 1: Engineering Mathematics
  • Tensors
  • Limits and continuity
  • Differentiation and differentiability
  • Vector algebra
  • Ordinary differential equations, by name
  • Sampling from distributions
  • Bayes' theorem
  • Solution of matrix equations
  • Backpropagation for neural networks
  • Functions, at the head of the Calculus list (analytic functions are listed in both years)
  • Integration, in the Calculus list (numerical integration is listed in both years)
  • Mean value theorems, by name
  • Theorems of integral calculus, by name
  • Vector identities, by name
  • Sampling theorems, by name
  • Matrix inversion, by name
First order equations: “(linear and nonlinear)” is no longer attached (2027 lists “first order linear differential equations”)
Section 2: Electricity and Magnetism
  • Permittivity
  • Magnetic field intensity and magnetic flux density
  • Permeability
  • Electrical and magnetic dipoles
  • Electromagnetic induction
  • B-H curve
  • Maxwell's equations (vector, differential and integral forms)
  • Divergence, by name
  • Curl, by name
  • Capacitance: “of simple configurations” is no longer attached
  • Self and mutual inductance: “of simple configurations” is no longer attached
Section 3: Electrical Circuits and Machines
  • Battery and solar cell
  • Coupled inductor, by name (2026 listed mutual inductance in the same list)
  • Transient analysis of RC, RL and LC circuits
  • Power and energy consumption, and power rating of components
  • Star-delta transformation
  • Miller's theorem
  • Power factor
  • Permanent magnet synchronous machines
  • Buck and boost converters, and single phase inverters
  • Rotor position and speed sensing, current sensing, and PWM control
  • Rectifiers (precision rectifiers are listed in Section 6 in both years)
  • Single phase transformer details, by name: equivalent circuit, phasor diagram, open circuit and short circuit tests, regulation (single phase transformers are still listed)
  • Three phase induction motors and every sub-topic listed under them, by name
  • Practical current and voltage sources (listed in both years): “V-I characteristics” is newly attached
  • Transient analysis of RLC circuits: “with dc excitation” is no longer attached
  • Losses and efficiency: listed under Electrical Circuits as “efficiency and losses”, and “efficiency calculations of electric machines” is not listed by name
  • One-port and two-port networks: now analysed “with controlled voltage and current sources”
Section 4: Signals and Systems
  • Sampling (2026 named sampling theorems in Sections 1 and 10, so no single source section is claimed)
  • Continuous-time systems
None
  • Fourier series (from Section 1)
  • Frequency response of linear time invariant systems: “first and second order” is no longer attached
Section 5: Control Systems
  • Role of sensing in feedback
  • Basic concept of supervisory control
  • Mechanical, hydraulic and pneumatic system components, by name
  • Synchro pair, by name
  • Control valves: “sizing of” is no longer attached (control valves now sit under the new heading “Actuators for control system”)
  • Basics of distributed control systems (DCS) and programmable logic controllers (PLC) (from Section 7)
Section 6: Analog Electronics
  • Biasing, power dissipation and DC analysis
  • Frequency response of transistor circuits
  • Amplifier design
  • Conductively, capacitively and inductively coupled interference
  • Noise generated by electronic components: thermal, shot and flicker noise
  • Component selection based on specifications, and circuit board realization and testing
Zener diode, by name
  • Diodes: now “types of diode and their applications” (2026: “characteristics and applications of diode”)
  • Comparators, Schmitt trigger and multivibrators, as op-amp applications (from Section 7)
  • Shielding and grounding (from Section 8)
Section 7: Digital Electronics
  • Demultiplexer
  • Truth table
  • ECL logic family
  • CMOS implementation of logic gates
  • Finite state machines
  • Programmable gain amplifier
  • ADC and DAC specifications: dynamic range, INL, DNL and ENOB
  • Embedded systems programming
  • Virtual instrumentation and IoT
  • Basic AI applications in instrumentation (sensor linearization, system calibration and tuning, signal classification)
None
  • Multiplexer beside sample-and-hold: now named “analog multiplexer”, under the new heading “Analog front end”
  • Microprocessors and microcontrollers: “applications” is no longer attached (now “common microprocessors and microcontrollers”)
Section 8: Measurements
  • Typical applications of bridges
  • Measurement of voltage, current and power in DC circuits
  • Contact and noncontact type probes, and voltage probes (AC and DC current probes are listed in both years)
  • Digital energy meter
  • Spectrum analyzer
None
  • Megohm: no longer listed among the bridges, now listed as “megohm measurement”
  • Oscilloscope: now “digital storage oscilloscope”
Section 9: Sensors and Industrial Instrumentation
  • Electromagnetic sensors (electromagnetic flow meters are listed in both years)
  • High pressure (low pressure is listed in both years)
  • 2-wire RTD (3- and 4-wire RTDs are listed in both years)
Open channel flow meters, by name
  • Displacement: “(linear and angular)” no longer follows displacement (2027 places it after acceleration)
  • Acceleration: “(linear and angular)” now follows acceleration (2026 placed it after displacement)
Section 10: Communication and Optical Instrumentation
  • Functional architectures of transmitters and receivers
  • Instrument and sensor networks
  • Near-infrared (NIR) sensing
Shannon's sampling theorem, by name (Section 4 lists sampling in 2027)
  • Digital modulation by the keying schemes: “and demodulation” is newly attached
  • 4-20 mA two-wire transmitter (from Section 9)

Source: IAE Academy's section-by-section comparison of the official GATE 2026 Instrumentation (IN) syllabus (IIT Guwahati) and the official GATE 2027 IN syllabus (IIT Madras), read 13 September 2026. Each entry quotes both PDFs; “not listed by name” means the words do not appear, not that a topic is out of scope.

About this resource

IAE Academy compared the official GATE 2026 Instrumentation Engineering (IN) syllabus, published by IIT Guwahati, with the official GATE 2027 IN syllabus, published by IIT Madras, section by section. The table lists what is newly listed in 2027, what is no longer listed by name, what moved between sections, and where only the words attached to an item listed in both years changed.

“Not listed by name” means the 2026 words do not appear in the 2027 PDF. It does not mean the topic is out of scope: an item worded differently in 2027 may still cover it. Where an item appears in both years, the table says so instead of reporting it as new or gone.

Every entry quotes both PDFs. A script checks that each quote appears in the right section of the right document and that each “not listed” term really is absent, so the comparison can be reproduced from the same two public PDFs.

What's included

  • ✓A section-by-section table covering all 10 GATE IN sections
  • ✓Items newly listed in 2027, and items no longer listed by name
  • ✓Items that moved between sections, and changes to the words attached to an item listed in both years
  • ✓Answers to common questions, each drawn from the table

How to use this resource

Go to the row for the section you want to check. Each column answers one question: what 2027 newly lists, what it no longer lists by name, and what moved or was reworded.

Read “not listed by name” literally, and check the full 2027 syllabus before treating any topic as gone.

For the complete wording of any item, open the official GATE 2027 syllabus in IAE Academy's Resource Centre.

Frequently asked questions

Is Bayes' theorem in the GATE IN 2027 syllabus?+

Yes, it is newly listed in 2027. Section 1 (Engineering Mathematics) now lists “conditional probability and Bayes' theorem”; the 2026 syllabus did not name Bayes' theorem. Mean value theorems, listed in 2026, are not listed by name in 2027.

Is permittivity in the GATE IN 2027 syllabus?+

Yes, it is newly listed in 2027 in Section 2 (Electricity and Magnetism), along with permeability, the B-H curve and Maxwell's equations (vector, differential and integral forms). Divergence and curl, listed in 2026, are not listed by name in 2027.

Are three phase induction motors in the GATE IN 2027 syllabus?+

They are not listed by name in 2027. Section 3 of the 2026 syllabus listed “Three phase induction motors” with sub-topics including torque-speed characteristics and blocked rotor tests; the 2027 PDF does not name induction motors. Permanent magnet synchronous machines are newly listed in the same section, and single phase transformers are still listed.

Is high pressure measurement in the GATE IN 2027 syllabus?+

Yes, it is newly listed in 2027. Section 9 now reads “pressure (including low and high pressure)”, where 2026 read “pressure (including low pressure)”. Displacement is listed in both years; 2026 placed “(linear and angular)” after displacement, and 2027 places it after acceleration. 3- and 4-wire RTDs are listed in both years, and 2-wire RTDs are newly listed.

Is Shannon's sampling theorem in the GATE IN 2027 syllabus?+

It is not listed by name in 2027. The 2026 syllabus named “Shannon's sampling theorem” in Section 10, and the 2027 syllabus lists “sampling” in Section 4 (Signals and Systems).

Where can I read the full official GATE IN 2027 syllabus?+

The official GATE 2027 syllabus, including the Instrumentation Engineering (IN) paper, is free to download from IAE Academy at /resources/gate-2027-syllabus.

Want guidance beyond free papers?

Our GATE programmes come with mentor support, 1:1 sessions, and a structured curriculum — not just a PDF.

Explore GATE IN coaching