Physics Previous Year Questions with Explanations
Concept revision + 10 clickable questions + detailed explanations
This lesson converts recurring previous-paper concepts into an exam-ready revision set. Question wording is independently rewritten for clarity; explanations are original; and official APPSC, UPSC, SSC and RRB repositories are linked for verification.
Topic Focus
Units, electricity, optics, sound, induction, buoyancy and everyday physics.
Rapid Answer Map
| No. | Question focus | Correct answer |
|---|---|---|
| 1 | The SI unit of force is: | Newton |
| 2 | The SI unit of work and energy is: | Joule |
| 3 | Ohm’s law is expressed as: | V = IR |
| 4 | The speed of light in vacuum is approximately: | 3 × 10⁸ m/s |
| 5 | Myopia is commonly corrected using a: | Concave lens |
| 6 | Sound cannot travel through: | Vacuum |
| 7 | Electromagnetic induction was discovered by: | Faraday |
| 8 | A transformer operates primarily with: | Alternating current |
| 9 | The principle of buoyancy is associated with: | Archimedes |
| 10 | Power is measured in: | Watt |
10 Clickable MCQs
The SI unit of force is:
Force is measured in newtons.
The SI unit of work and energy is:
Work and energy are measured in joules.
Ohm’s law is expressed as:
Ohm’s law relates potential difference, current and resistance: V = IR.
The speed of light in vacuum is approximately:
Light travels in vacuum at about 3 × 10⁸ metres per second.
Myopia is commonly corrected using a:
A concave lens diverges light so that distant objects focus on the retina.
Sound cannot travel through:
Sound is a mechanical wave and requires a material medium.
Electromagnetic induction was discovered by:
Michael Faraday demonstrated that changing magnetic flux can induce an emf.
A transformer operates primarily with:
A transformer uses changing magnetic flux produced by alternating current.
The principle of buoyancy is associated with:
Archimedes’ principle states that buoyant force equals the weight of displaced fluid.
Power is measured in:
The watt is the SI unit of power.
Common Exam Traps
Quick Revision Checklist
- 1. Newton — One newton gives a one-kilogram mass an acceleration of one metre per second squared.
- 2. Joule — Power is the rate of doing work and is measured in watts.
- 3. V = IR — It applies under constant physical conditions.
- 4. 3 × 10⁸ m/s — Sound is much slower and requires a medium.
- 5. Concave lens — Hypermetropia is generally corrected with a convex lens.
- 6. Vacuum — Electromagnetic waves can travel through vacuum.
- 7. Faraday — This principle underlies generators and transformers.
- 8. Alternating current — It changes voltage according to turns ratio in an ideal case.
Frequently Asked Questions
Are these questions copied from coaching websites?
No. Questions are independently rewritten from recurring concepts in official paper repositories and standard sources.
Why is an exact exam year not shown beside every question?
An exam and year are shown only when the source can be checked reliably. This prevents incorrect PYQ attribution.
How should I use this page?
Attempt all questions once, study explanations, revise the answer map, and reattempt after two days.
Official Paper Sources
- APPSC – Question papers and final keys
- APPSC – Question papers of various notifications
- UPSC – Previous question papers
- SSC – Official portal and previous papers
- RRB – Official question/response notices
Source policy: Official repositories establish the tested concepts. Explanations and practice presentation here are original.
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