Physics

Physics – Verified PYQ Authority Guide

Physics is a sub-topic revision hub built around verified PYQ evidence. It connects the recurring question patterns inside this sub-topic with the formulas, exam tips, common traps and concept pages already present in SRO. Every factual learning cue below is drawn from the existing verified, published and approved English PYQ corpus or from its Knowledge Graph relationships; the hub does not invent unsupported technical claims.

PYQ evidence snapshot

44 verified PYQs are currently mapped to this Sub Topic hub. The represented years include 2025. Exam coverage currently includes RRB NTPC Under Graduate Level. Subject context includes General Awareness. These values come from live mappings and can expand automatically when new verified PYQs are added.

Most useful verified PYQs to solve first

Start with the actual questions rather than memorising a generic note. The links below are ranked from the mapped corpus using repeat history and editorial quality, while the complete explanation stays on the individual question page.

1. Mirage is an optical illusion which can be explained based on which of the following phenomena of light?
   RRB NTPC Under Graduate Level · 2025 · Basic Physics
   The correct answer is Total Internal Reflection. This PYQ tests Basic Physics and should be revised as a fact association.
2. Which of the following densities measures the pressure of population on net cultivated area in India?
   RRB NTPC Under Graduate Level · 2025 · Basic Physics
   The correct answer is Physiological density. This PYQ tests Basic Physics and should be revised as a fact association.
3. The transverse nature of light can be demonstrated using ______.
   RRB NTPC Under Graduate Level · 2025 · Basic Physics
   The correct answer is Polaroid. This PYQ tests Basic Physics and should be revised as a fact association.
4. When electricity is passed through an aqueous solution of sodium chloride (called brine), it decomposes to form sodium hydroxide. This process is called:
   RRB NTPC Under Graduate Level · 2025 · Basic Physics
   The correct answer is Chlor-alkali process. This PYQ tests Basic Physics and should be revised as a fact association.
5. The female labour force participation rate (LFPR) for persons aged 15+ in October 2025 reached approximately:
   RRB NTPC Under Graduate Level · 2025 · Basic Physics
   The correct answer is 34.2 %. This PYQ tests Basic Physics and should be revised as a fact association.
6. If a ball is thrown vertically upward, which of the following describes its velocity at the highest point?
   RRB NTPC Under Graduate Level · 2025 · Basic Physics
   The correct answer is Zero. This PYQ tests Basic Physics and should be revised as a fact association.
7. Which of the following elements is malleable and a good conductor of heat and electricity?
   RRB NTPC Under Graduate Level · 2025 · Basic Physics
   The correct answer is Barium (Ba). This PYQ tests Basic Physics and should be revised as a fact association.
8. The quantity represented by the unit volt per ampere corresponds to which electrical unit?
   RRB NTPC Under Graduate Level · 2025 · Basic Physics
   The correct answer is Ohm. This PYQ tests Basic Physics and should be revised as a fact association.

Formula & key-relationship bank from verified solutions

• sin²θ + cos²θ = 1; tanθ = sinθ/cosθ; cotθ = 1/tanθ
• Percentage = (Part / Whole) × 100

Use these as revision triggers and open the linked PYQ before applying a formula numerically; variable definitions and assumptions belong to the exact solved question.

Core ideas repeatedly reinforced by the solved corpus

• The correct answer is Total Internal Reflection. This PYQ tests Basic Physics and should be revised as a fact association.
• The correct answer is Physiological density. This PYQ tests Basic Physics and should be revised as a fact association.
• The correct answer is Polaroid. This PYQ tests Basic Physics and should be revised as a fact association.
• The correct answer is Chlor-alkali process. This PYQ tests Basic Physics and should be revised as a fact association.
• The correct answer is 34.2 %. This PYQ tests Basic Physics and should be revised as a fact association.

Exam tips already validated in SRO solutions

• Revise Basic Physics with closely related General Science facts to eliminate similar distractors.

Common mistakes to avoid

• Selecting a familiar term without checking the exact qualifier, year, institution, article, place or definition.

Topic and concept coverage

Mapped topic labels include General Science. The concept trail includes Basic Physics. Use these labels as a revision map: move from the broad area to the narrow concept, solve a verified PYQ, inspect the detailed reasoning, and then attempt another question from the same cluster.

Knowledge Graph navigation

Continue with General Science, Basic Physics, General Awareness, General Awareness. These are canonical SRO entity links based on the Knowledge Graph and shared question mappings, not keyword-stuffed tag pages.

How to revise this authority page efficiently

1. Solve before reading: answer a mapped PYQ first.
2. Read the exact explanation: verify the correct principle, formula, distractor logic and common mistake on that question page.
3. Move one level in the graph: use the closest concept/sub-topic/topic link rather than opening unrelated content.
4. Reattempt: solve another verified PYQ from this hub and check whether the same error repeats.

Quality scope: this page is automatically maintained from SRO’s verified mapped corpus. It enriches one canonical authority URL instead of generating multiple near-duplicate pages for keyword variants. Manual authority articles are never overwritten by the automated engine.