After conducting a deep check comparing your categorized markdown (pyq catagorised.md) against the original exam papers (2015–2025), I found that the previous categorization violated the strict “do not merge non-identical questions” rule in several places.
To force groupings, some questions were truncated, some were hallucinated with bracketed text (e.g., [or 530 KHz]), and several unique questions were completely skipped or merged improperly.
Here are all the missing, corrupted, and hallucinated questions that must be added to your question bank to ensure 100% accuracy.
Topic 3: Magnetostatics
| Subtopic [Error Type] | Exact Question + [Marks] | Year(s) of Appearance |
|---|---|---|
| Magnetic Dipole & Magnetization (Completely Missing) | Define following terms: (i) Magnetic field intensity (ii) Magnetization vector (iii) Magnetic dipole moment and (iv) Scalar magnetic potential. (12) | 2018 |
| Biot-Savart Law (Corrupted/Merged improperly) | State Biot-Savart law. A direct current I flows in a straight wire of length 2L. Find the magnetic flux density B at point located at a distance r from the wire in the bisecting plane of Fig. 5(b): i) by determining the vector magnetic potential A first, and ii) by applying Biot-Savart law. (18) | 2016 |
Topic 5: Electromagnetic Waves
| Subtopic [Error Type] | Exact Question + [Marks] | Year(s) of Appearance |
|---|---|---|
| Wave Propagation Math (Corrupted / Truncated) | Determine (i) attenuation constant (ii) phase constant (iii) intrinsic impedance and (iv) phase velocity for both low-loss dielectrics and good conductor. (12) (Note: The previous list truncated parts iii and iv to merge it with 2025) | 2019 |
| Propagation Math (Hallucinated / Merged) | A narrow band signal propagates in lossy dielectric medium which has a loss tangent 0.2 at 550 Hz, the carrier frequency of the signal. The dielectric constant of the medium is 2.5, (i) determine and (ii) determine and . Is the medium dispersive? (12) (Note: The previous list hallucinated [or 0.3] and [or 530 KHz] to merge this with the 2021 question. 2017 has unique values/typos). | 2017 |
| Propagation Math (Corrupted / Merged) | A y-polarized uniform plane wave () with a frequency 100 MHz propagates in air in the +x direction and impinges normally on a perfectly conducting plane at x=0. Assuming the amplitude of to be 6 mV/m, write the phasor and instantaneous expressions for (i) and of the incident wave; (ii) and of the reflected wave. (08) (Note: Merged with 2015, but 2016 only asks for parts i and ii). | 2016 |
| Wave Propagation (Completely Missing) | Explain low loss dielectrics and good conductors. Explain their behavior under the impact of external fields. (09) | 2023 |
| Polarization (Corrupted / Merged) | Two orthogonal linearly polarized waves are combined together. Now, state the conditions under which the resultant will be another linearly polarized wave. (10) (Note: Merged into the generic 3-part question, but 2025 only asks for ONE specific condition). | 2025 |
| Reflection & Polarization (Completely Missing) | What is meant by polarization of a wave? Show that the reflection and transmission coefficients are related with the following expression , where the symbols have their usual meaning. (11) | 2015 |
| Polarization (Corrupted / Merged) | “Superposition of two linearly polarized waves: one polarized in the x direction and the other in the y-direction and lagging with different amplitude gives rise to elliptically polarized wave”-Justify the statement. (11) (Note: Merged inappropriately with the “negative circularly polarized wave” question). | 2018 |
Topic 6: Radio Wave Propagation
| Subtopic [Error Type] | Exact Question + [Marks] | Year(s) of Appearance |
|---|---|---|
| Ionospheric Terms (Corrupted / Replaced) | What is polarization? If total number of electrons in the ionosphere is around per cm, then what is the minimum frequency above which radio communication can be established between space-craft and earth? (02+05) (Note: The previous list deleted “What is polarization?” and replaced it with “Derive the equation of plasma frequency…” to force a merge with 2023). | 2019 |
| Ionospheric Terms (Completely Missing) | Define: (i) Critical frequency (ii) Maximum usable frequency (iii) Minimum usable frequency for radio wave propagation. (06) | 2018 |
| Ionospheric Terms (Completely Missing) | Write short notes on: i) Skip distance, ii) Virtual height, and iii) Critical frequency. (06) | 2016 |
| Ionospheric Terms (Corrupted / Merged) | Explain the following terms: i) Doppler effect in electromagnetics, ii) Skin depth of a conductor, iii) Plasma frequency and plasma oscillation. (09) (Note: Skipped because it didn’t perfectly match the generic 2021 wording). | 2016 |
| Propagation Modes (Corrupted / Merged) | State the mode of propagation for each of the following services and explain the reason. i) FM radio broadcasting ii) SW radio-broadcasting iii) Cellular telephones iv) Satellite communication (10) (Note: The previous list deleted “FM radio broadcasting” to make it identical to the 2019/2021 version). | 2015 |