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Physics (light, electricity) MCQs for RAS

Practice 20 free physics (light, electricity) multiple choice questions for RAS exam. Instant answers, explanations in Hindi and English, and topic-wise targeted practice.

Master Physics (light, electricity) under Basic Science for RAS with our curated MCQ set. Every question is sourced from real Rajasthan exam patterns and updated regularly. Switch between Hindi and English anytime. Use this daily to strengthen weak areas before the exam.

RAS — Basic Science — Physics (light, electricity)

20 Questions • Instant results & explanations • Hindi & English

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Question 1 of 20

The interior chamber of a standard household fluorescent tubelight is sealed and contains a highly specific mixture of elemental gases. When a high-voltage electrical current is applied to the tubelight, which precise gases undergo ionization to initiate the lighting sequence?

Question 2 of 20

Match List-I (Diagnostic/Communication Tool) with List-II (Underlying Physics Principle) and select the correct answer using the codes given below: List-I A. MRI B. X-ray Machine C. Optical Fiber D. Mobile Phones List-II 1. Microwaves and Radio waves 2. High-frequency electromagnetic waves 3. Electromagnetism 4. Total Internal Reflection

Question 3 of 20

What is the SI unit of the power of a lens?

Question 4 of 20

Match List I (Mathematical Optic Notations) with List II (Physical Quantity) and select the correct option: List-I a. u b. v c. f d. hi List-II 1. Height of the image 2. Object distance 3. Image distance 4. Focal length

Question 5 of 20

The slight bending of light waves as they pass around the sharp edges of an opaque object or through a narrow aperture is known as:

Question 6 of 20

An astronomical telescope is configured to view highly distant celestial objects like stars and planets. Which design specification is crucial for its objective lens to capture high-quality images?

Question 7 of 20

Consider the following statements regarding the resistivity of a metallic wire: 1. If a wire is cut perfectly in half, its resistivity becomes half. 2. Resistivity is completely independent of the physical dimensions of the conductor. Which of the statement(s) given above is/are correct?

Question 8 of 20

Match List-I (Hindi Terminology) with List-II (English Terminology): List-I A. Yantriki B. Ushmagatiki C. Prakashiki D. Chumbakatva List-II 1. Optics 2. Magnetism 3. Mechanics 4. Thermodynamics Choose the correct code:

Question 9 of 20

Given below are two statements, one labeled as Assertion (A) and the other as Reason (R): Assertion (A): Physics helps in understanding the macroscopic behavior of galaxies. Reason (R): Magnetism solely studies the interaction of subatomic particles. In the context of the above two statements, which one of the following is correct?

Question 10 of 20

Match List-I (Optical Phenomena) with List-II (Examples in Nature): List-I P. Dispersion Q. Scattering R. Tyndall Effect List-II 1. Blue color of the sky 2. Visible light beam in a dusty room 3. Formation of a spectrum in a rainbow Select the correct matching:

Question 11 of 20

A comprehensive analysis of Paramagnetic, Diamagnetic, and Ferromagnetic materials based strictly on their magnetic susceptibility involves defining complex physical behaviors. In the RAS Mains examination, such a topic is typically formulated as a:

Question 12 of 20

Oxygen is a gaseous element that exhibits a weak attraction towards external magnetic fields. Based on this specific interaction, how is Oxygen classified magnetically?

Question 13 of 20

Which of the following is considered the foundational discipline of the natural sciences that establishes the framework for understanding the universe?

Question 14 of 20

A student claims that the laws of reflection ($angle i = angle r$ and coplanarity) only apply to perfectly flat, smooth mirrors. Is this claim scientifically accurate?

Question 15 of 20

Which of the following statements best defines the term 'Electric Power' in a physical context?

Question 16 of 20

According to Snell's Law of refraction, the ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant. This constant specifically depends on which of the following factors?

Question 17 of 20

If multiple symmetric images are required to be viewed within an enclosed decorative tube, the mathematical principle guiding its construction ensures 360/θ is an even integer. This defines the core engineering of a:

Question 18 of 20

An electric fuse is a critical safety device in any electrical circuit. Which specific combination of physical properties is essential for a fuse wire to function correctly during a current overload?

Question 19 of 20

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

Question 20 of 20

Consider the following statements regarding the properties of light: 1. Light requires a dense material medium to sustain its electromagnetic oscillations. 2. In a homogeneous medium, light inherently travels in straight lines. Which of the statements given above is/are correct?

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