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Patwari — Physics (light, electricity) MCQs

Practice 20 free physics (light, electricity) multiple choice questions for Patwari exam. Instant answers with explanations in Hindi and English.

Master Physics (light, electricity) under Basic Science for Patwari with our curated MCQ set. Every question follows real Rajasthan exam patterns. Switch between Hindi and English anytime.

Patwari — Basic Science — Physics (light, electricity)

20 Questions • Instant results & explanations • Hindi & English

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Question 1 of 20

In the context of the human eye, the mnemonic 'CAVE' is often used by students to remember that a concave lens helps a person see deep into the distance. This effectively corrects which medical condition?

Question 2 of 20

Consider the following statements regarding a Myopic eye: A. It experiences an elongation of the eyeball. B. It requires a converging lens for correction. C. The focal point of distant objects falls in front of the retina. Which of the above is/are definitively correct?

Question 3 of 20

In the context of competitive examinations for civil services, what is the primary purpose of evaluating candidates on scientific subjects?

Question 4 of 20

Assertion (A): Semiconductor materials are the definitive foundation of modern computing and electronics. Reason (R): Their electrical resistivity lies infinitely high, making them safe from short circuits.

Question 5 of 20

How does the speed of light change when it transitions from a vacuum into a denser medium like glass or water?

Question 6 of 20

Which of the following atmospheric phenomena is fundamentally caused by the 'Scattering of Light' due to interactions with atmospheric gas molecules and micro-particles?

Question 7 of 20

Assertion (A): Danger signals are painted red because red light undergoes the maximum amount of scattering in the atmosphere. Reason (R): Red light possesses the longest wavelength in the visible spectrum.

Question 8 of 20

Consider the following areas of study: 1. Quantum Mechanics 2. Nuclear Physics 3. Relativity Which branch of physics collectively encompasses all three of these advanced fields?

Question 9 of 20

Which of the following classical optical instruments operates fundamentally on the principle of the rectilinear propagation of light?

Question 10 of 20

The structural operation of high-speed internet transmission via Optical Fibers and the naturally occurring atmospheric illusion known as a Mirage share which underlying common physical principle?

Question 11 of 20

Assertion (A): A concave mirror is frequently selected by individuals specifically for use as a precision shaving mirror. Reason (R): When a person's face is positioned precisely between the pole and the principal focus of a concave mirror, the resulting reflection is an enlarged, virtual, and erect image.

Question 12 of 20

What happens to sunlight as it travels through a thicker layer of the atmosphere during sunset, giving the sun a reddish appearance?

Question 13 of 20

A uniform metal conductor wire has a starting baseline electrical resistance of R = 5 Ω. If this wire is carefully drawn out and stretched until its final length becomes exactly four times (4L) its original value, what will be its final electrical resistance, assuming temperature and material resistivity remain constant?

Question 14 of 20

Which specific branch of physics forms the core operational foundation for Magnetic Resonance Imaging (MRI) machines used heavily in Medical Diagnostics?

Question 15 of 20

Industrial heavy-duty cranes and medical MRI machines require powerful magnetic fields that can be activated and deactivated instantaneously. Which of the following materials constitutes the ideal core for constructing these electromagnets?

Question 16 of 20

If a candidate stands exactly 3.5 meters in front of a large plane mirror in a dressing room, what is the exact distance of their reflection (image) behind the mirror?

Question 17 of 20

Match the visual defects in List-I with their respective causes in List-II. List-I P. Presbyopia Q. Astigmatism R. Myopia S. Hypermetropia List-II 1. Irregular curvature of the cornea 2. Loss of elasticity of ciliary muscles 3. Shortening of eyeball 4. Elongation of eyeball Select the correct combination:

Question 18 of 20

Which of the following conventions correctly matches the type of lens with the sign of its optical power?

Question 19 of 20

Why does an understanding of physics aid in technological policy comprehension?

Question 20 of 20

Consider the following statement: 'The energy conversion taking place inside a motor is precisely the opposite of the energy conversion occurring inside a generator.' In the context of the RAS Preliminary Examination, evaluating this type of factual clarity typically involves which type of question format?

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