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Physics (light, electricity) MCQs for Rajasthan SI

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

Master Physics (light, electricity) under Basic Science for Rajasthan SI 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.

Rajasthan SI — Basic Science — Physics (light, electricity)

20 Questions • Instant results & explanations • Hindi & English

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Question 1 of 20

Which of the following is NOT an element studied under 'Electricity (Vidyut)'?

Question 2 of 20

Which of the following optical principles best justifies the use of concave mirrors inside vehicle headlights?

Question 3 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 4 of 20

Which of the following lenses is thicker at the center and possesses converging properties?

Question 5 of 20

Assertion (A): Semiconductor materials like Silicon are the foundation of modern electronics and solar cells. Reason (R): Semiconductors possess a unique property where their electrical conductivity increases with an increase in temperature, unlike typical metallic conductors.

Question 6 of 20

Assertion (A): For telecommunications, the backbone networks prefer X-rays over optical fibers because X-rays carry more data. Reason (R): Optical fibers rely on total internal reflection to securely guide light signals over vast distances.

Question 7 of 20

Why is light capable of traveling across the vast, empty vacuum of interstellar space to reach Earth?

Question 8 of 20

If a copper wire is cut into two equal halves, what is the effect on its resistivity?

Question 9 of 20

Electrical Resistivity (ρ) is a fundamental parameter in circuit design. Which of the following statements correctly isolates the nature of resistivity compared to resistance?

Question 10 of 20

The Cartesian sign convention relies heavily on the direction of incident light. In a standard setup where light travels from left to right, the focal length of a concave mirror will be:

Question 11 of 20

According to standard dimensional analysis in physics, if an examination question specifically asks to calculate the electrical 'Power' consumed by a circuit, which of the following unit options must be immediately eliminated?

Question 12 of 20

Consider the following statements regarding the RSSB examination pattern for posts such as Police SI and Patwari: 1. The examinations emphasize descriptive essays on modern physics concepts. 2. The physics numericals tested are predominantly based on NCERT Class 10 concepts. Which of the above statements is/are correct?

Question 13 of 20

Which of the following medical diagnostic technologies relies exclusively on strong magnetic fields and the principles of electromagnetism rather than ionizing radiation?

Question 14 of 20

Match List-I (Physics Topics) with List-II (Branch of Physics): List-I A. Energy transfer B. Optical instruments C. Motion and work D. Nuclear fission List-II 1. Modern Physics 2. Thermodynamics 3. Optics 4. Mechanics Choose the correct code:

Question 15 of 20

Consider a scenario where two solid objects are confirmed to have the exact same temperature, but they contain drastically different amounts of heat. How is this scientifically possible?

Question 16 of 20

Which specific metallic element is predominantly utilized as the primary semiconductor material in the large-scale manufacturing of commercial solar cells?

Question 17 of 20

In the context of modern telecommunications, which of the following combinations correctly identifies the specific segments of the electromagnetic spectrum used by mobile phones?

Question 18 of 20

Why is Alternating Current (AC) overwhelmingly preferred over Direct Current (DC) by modern utility companies for the long-distance transmission of electrical power?

Question 19 of 20

In a person suffering from Myopia, where does the image of a distant object form?

Question 20 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?

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