AKTU Electrical Measurements and Instrumentation · Important Questions 2026Source: ryzenstudy.com PYQs
BEE302 Electrical Measurements and Instrumentation Important Questions 2026 (AKTU)
Repeat analysis + most-asked questions, unit-wise
What we did: built from all 5 AKTU Electrical Measurements and Instrumentation papers (2021-22–2024-25 (Sem 4)): 119 questions grouped into 61 distinct questions, 31 of which were asked in more than one paper.
- of marks were repeat questions
- 62%
- of marks were repeat questions
- questions asked in 2+ papers
- 31
- questions asked in 2+ papers
- papers analysed (2021-22–2024-25 (Sem 4))
- 5
- papers analysed (2021-22–2024-25 (Sem 4))
- units, mapped to current syllabus
- 5
- units, mapped to current syllabus
How much of the paper repeats?
- Repeats are real: when we checked each newer BEE302 paper against the papers before it, on average 62% of its marks were questions already asked in an earlier paper.
- 2023-24 paper: 46% of marks were repeats (7 of 10 repeated questions were in our top list).
- 2024-25 (Sem 3) paper: 78% of marks were repeats (12 of 16 repeated questions were in our top list).
- 2024-25 (Sem 4) paper: 64% of marks were repeats (5 of 15 repeated questions were in our top list).
- Topic weightage is a guide, not a guarantee: our Tier 1 + Tier 2 topics covered 54% of the next paper's marks — picking the same number of topics at random would have covered about 48%.
Across 10 subjects and 23 papers we tested, 43% of marks repeated earlier questions on average.
1.Unit-wise most-asked questions
Ranked by how many papers asked them, then by how recently. Click a paper to open it.
Unit 1:
18% of past marks| Question | Asked |
|---|---|
| What is Limiting error in measurement? Three resistors are specified as: R1 = 200Ω ± 5%, R2 = 100Ω ± 5% and R3 = 50Ω ± 5%. Determine the magnitude of the resultant resistance and the limiting error in percentage and in ohms if the resistances are connected in series. | Asked 3× |
| Illustrate the construction and operation of attraction and repulsion type of moving iron instruments. Also derive the expression of deflecting torque. Enlist the advantages, disadvantages of these instruments. | Asked 3× |
| Explain the working principle of PMMC instruments. How the current range of PMMC instrument extended with the help of shunts? | Asked 3× |
| Explain the classification of measuring instruments with examples and their working principles. | Asked 2× |
Unit 2: MEASURMENT OF POWER & ENERGY
9% of past marks| Question | Asked |
|---|---|
| Explain the following instruments with proper diagram: (i) Power factor meter (ii) Analog frequency meter. | Asked 2× |
| What is creeping in Energy Meters? How it is prevented? | Asked 2× |
| Explain the construction and working of a single-phase electrodynamometer-type wattmeter. Also, derive the expression of deflecting and controlling torque. | Asked 2× |
| What are the types of wattmeters in measurement systems? Explain two wattmeter method for power measurement in balanced and unbalanced three phase system. 7 marks2024-25 (Sem 3) Q2(b) | Asked 1× |
Unit 3: POTENTIOMETERS, DC & AC BRIDGES
22% of past marks| Question | Asked |
|---|---|
| Explain Maxwell's bridge method for inductance measurement with a neat circuit diagram. | Asked 4× |
| Explain the working principle of Kelvin's double bridge for the measurement of unknown low resistances. | Asked 3× |
| Explain Schering Bridge for the measurement of unknown capacitance. How the measure the loss angle and dissipation factor using Schering Bridge? The Schering Bridge has the following constants: Arm AB – capacitor of 1µF in parallel with 1.2kΩ resistance, Arm AD – resistance of 4.7kΩ, Arm BC – capacitor of 1µF and Arm CD – unknown capacitor Cx and resistance Rx. Calculate the unknown capacitance and its dissipation factor. The frequency is given as 0.5 kHz. | Asked 3× |
| What is the principle of an AC bridge? | Asked 2× |
Unit 4:
33% of past marks| Question | Asked |
|---|---|
| Define transformation ratio in instrument transformers. | Asked 5× |
| The exciting current of a ring core current transformer of ratio 1000/5 A, when operating at full primary current and with a secondary burden of non-inductive resistance of 1 ohm, is 1 A at a power factor of 0.4. Calculate the phase displacement between primary and secondary winding currents and the ratio error at full load, assuming that there has been no compensation. | Asked 4× |
| Draw and explain the equivalent circuit and phasor diagram of current transformer (C.T.). State the ratio error present in current transformer. Also differentiate between current transformer and potential transformer. | Asked 4× |
| Describe the construction and working of general purpose CRO with its block diagram and explain its components. | Asked 3× |
Unit 5: TRANSDUCERS
19% of past marks| Question | Asked |
|---|---|
| Explain the principle, construction and working of strain gauge transducer and formulate the expression for gauge factor in terms of Poisson’s ratio. | Asked 4× |
| What is an electrical transducer? What are the basic requirements of a transducer? Give the classification of a transducer. | Asked 3× |
| What is the basic principle of piezoelectric transducer? | Asked 3× |
| Differentiate between active and passive transducers. | Asked 3× |
2.Topic weightage: which topics carry the marks
Blue = Tier 1 + Tier 2 (topics that carried ~80% of past marks). Grey = the rest. It shows where marks have gone, not a promise of what comes next.
Ratio & phase angle errors · U4
10.6% (cum 11%)
Inductance bridges · U3
9.5% (cum 20%)
PMMC & moving iron instruments · U1
7.1% (cum 27%)
Errors in measurement · U1
6% (cum 33%)
Strain gauge · U5
5.6% (cum 39%)
CT & PT construction and working · U4
5.3% (cum 44%)
Spectrum & wave analyzers · U4
5.2% (cum 49%)
CRO principle & operation · U4
4.2% (cum 54%)
Digital voltmeter & counters · U4
4.1% (cum 58%)
Resistance measurement & Wheatstone bridge · U3
3.7% (cum 61%)
Characteristics & choice of transducers · U5
3.5% (cum 65%)
Capacitance bridges · U3
3.1% (cum 68%)
Kelvin double bridge · U3
3.1% (cum 71%)
Piezoelectric transducer · U5
2.7% (cum 74%)
Classification of transducers · U5
2.4% (cum 76%)
Classification & methods of measurement · U1
2.4% (cum 79%)
Potentiometers · U3
2.3% (cum 81%)
LVDT · U5
2.3% (cum 83%)
Energy meters · U2
2.2% (cum 85%)
Dynamometer & induction wattmeter · U2
2.1% (cum 87%)
Power factor & frequency meters · U2
2.1% (cum 90%)
Electronic voltmeters & multimeter · U4
1.7% (cum 91%)
Thermistors & thermocouples · U5
1.4% (cum 93%)
Types of wattmeters · U2
1.3% (cum 94%)
Three-phase power measurement · U2
1.3% (cum 95%)
Measurement system & characteristics · U1
1.2% (cum 96%)
Capacitive transducer · U5
1% (cum 97%)
Range extension of meters · U1
1% (cum 98%)
Testing & design of CT/PT · U4
1% (cum 99%)
CRO time, frequency, phase measurement · U4
0.8% (cum 100%)
| Topic | Papers | Share |
|---|---|---|
| Ratio & phase angle errors · Unit 4 · Tier 1 | 5/5 | 10.6% |
| Inductance bridges · Unit 3 · Tier 1 | 5/5 | 9.5% |
| PMMC & moving iron instruments · Unit 1 · Tier 1 | 4/5 | 7.1% |
| Errors in measurement · Unit 1 · Tier 1 | 5/5 | 6% |
| Strain gauge · Unit 5 · Tier 1 | 5/5 | 5.6% |
| CT & PT construction and working · Unit 4 · Tier 1 | 4/5 | 5.3% |
| Spectrum & wave analyzers · Unit 4 · Tier 1 | 5/5 | 5.2% |
| CRO principle & operation · Unit 4 · Tier 1 | 3/5 | 4.2% |
| Digital voltmeter & counters · Unit 4 · Tier 2 | 2/5 | 4.1% |
| Resistance measurement & Wheatstone bridge · Unit 3 · Tier 2 | 4/5 | 3.7% |
| Characteristics & choice of transducers · Unit 5 · Tier 2 | 3/5 | 3.5% |
| Capacitance bridges · Unit 3 · Tier 2 | 3/5 | 3.1% |
| Kelvin double bridge · Unit 3 · Tier 2 | 3/5 | 3.1% |
| Piezoelectric transducer · Unit 5 · Tier 2 | 3/5 | 2.7% |
| Classification of transducers · Unit 5 · Tier 2 | 3/5 | 2.4% |
| Classification & methods of measurement · Unit 1 · Tier 2 | 3/5 | 2.4% |
| Potentiometers · Unit 3 · Tier 2 | 2/5 | 2.3% |
| LVDT · Unit 5 · Tier 3 | 2/5 | 2.3% |
| Energy meters · Unit 2 · Tier 3 | 2/5 | 2.2% |
| Dynamometer & induction wattmeter · Unit 2 · Tier 3 | 2/5 | 2.1% |
| Power factor & frequency meters · Unit 2 · Tier 3 | 2/5 | 2.1% |
| Electronic voltmeters & multimeter · Unit 4 · Tier 3 | 2/5 | 1.7% |
| Thermistors & thermocouples · Unit 5 · Tier 3 | 2/5 | 1.4% |
| Types of wattmeters · Unit 2 · Tier 3 | 1/5 | 1.3% |
| Three-phase power measurement · Unit 2 · Tier 3 | 1/5 | 1.3% |
| Measurement system & characteristics · Unit 1 · Tier 3 | 2/5 | 1.2% |
| Capacitive transducer · Unit 5 · Tier 3 | 1/5 | 1% |
| Range extension of meters · Unit 1 · Tier 3 | 1/5 | 1% |
| Testing & design of CT/PT · Unit 4 · Tier 3 | 1/5 | 1% |
| CRO time, frequency, phase measurement · Unit 4 · Tier 3 | 2/5 | 0.8% |
3.Paper pattern (2024-25 (Sem 4))
| Section | Questions | Rule |
|---|---|---|
| A | 8 × 2 marks | Attempt all |
| B | 5 × 10 marks | Attempt any 3 |
| C | 11 × 10 marks | Attempt any 1 |
4.In the syllabus, never asked yet
Low priority, but read them once — a new paper can always start here.
- Deflecting, controlling, damping torques · U1
- Electrostatic & induction instruments · U1
- Photo-electric devices · U5
5.Study order
- 1Ratio & phase angle errors (Unit 4, Tier 1)
- 2Inductance bridges (Unit 3, Tier 1)
- 3PMMC & moving iron instruments (Unit 1, Tier 1)
- 4Errors in measurement (Unit 1, Tier 1)
- 5Strain gauge (Unit 5, Tier 1)
- 6CT & PT construction and working (Unit 4, Tier 1)
- 7Spectrum & wave analyzers (Unit 4, Tier 1)
- 8CRO principle & operation (Unit 4, Tier 1)
- 9Digital voltmeter & counters (Unit 4, Tier 2)
- 10Resistance measurement & Wheatstone bridge (Unit 3, Tier 2)
- 11Characteristics & choice of transducers (Unit 5, Tier 2)
- 12Capacitance bridges (Unit 3, Tier 2)
- 13Kelvin double bridge (Unit 3, Tier 2)
- 14Piezoelectric transducer (Unit 5, Tier 2)
- 15Classification of transducers (Unit 5, Tier 2)
- 16Classification & methods of measurement (Unit 1, Tier 2)
- 17Potentiometers (Unit 3, Tier 2)
FAQ
Which units of BEE302 carry the most marks?
Unit 4 (, 33% of past marks) and Unit 3 (POTENTIOMETERS, DC & AC BRIDGES, 22% of past marks).
Do AKTU Electrical Measurements and Instrumentation questions repeat?
Yes. On average 62% of the marks in each newer BEE302 paper came from questions already asked in an earlier paper, and 31 questions have appeared in more than one paper.
How is this list made?
Every question from the 5 papers (2021-22–2024-25 (Sem 4)) was mapped to the current AKTU syllabus and grouped with the same question from other years. Questions are ranked by how many papers they appeared in, then by how recently.
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Note: this is based on past AKTU papers, not a guarantee. Questions are mapped to the current syllabus; topics that are no longer in the syllabus are left out.