Physics (light, electricity) MCQs for RAS
Practice 20 free Physics (light, electricity) questions under Basic Science — Science & Tech.
Strengthen your Physics (light, electricity) knowledge for RAS with curated MCQs. Switch between Hindi and English anytime.
RAS — Basic Science — Physics (light, electricity)
20 Questions • Instant results & explanations • Hindi & English
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Question 1 of 20
The illumination produced by a traditional tungsten bulb is scientifically attributed to which of the following physics principles?
Question 2 of 20
Copper is heavily used for residential household wiring networks and industrial grids. Which physical characteristic makes copper the ideal choice for these systems?
Question 3 of 20
Assertion (A): X-rays are highly effective for mapping the intricate soft tissue networks within the human brain. Reason (R): X-rays consist of high-frequency electromagnetic waves that are primarily absorbed by dense structures.
Question 4 of 20
Unlike modern LED or fluorescent technology, the illumination generated by a traditional, old-fashioned tungsten bulb is scientifically categorized as an application of which foundational physical phenomenon?
Question 5 of 20
Modern Physics (Aadhunik Bhautiki) encompasses highly advanced topics. Which of the following subjects are grouped under this branch?
Question 6 of 20
Assertion (A): Mathematical calculations based on NCERT Class 10 concepts, such as finding equivalent resistance, are highly critical for RSSB exams like Police SI and Patwari. Reason (R): The RSSB exam pattern heavily leans toward high-frequency objective facts and direct numerical problem-solving.
Question 7 of 20
Explaining the specific 'Nature of EM (Electromagnetic) waves' typically corresponds to which category of question format in State Administrative descriptive examinations?
Question 8 of 20
Consider the following statements regarding the electrical properties of materials: 1. Silver is considered the best conductor of electricity due to its extremely low resistivity. 2. The conductivity of semiconductors like Silicon and Germanium decreases as temperature increases. 3. Insulators completely block electron flow due to their infinitely high resistivity. Which of the statements given above is/are correct?
Question 9 of 20
Which of the following geometric concepts is critical to understanding the second law of reflection?
Question 10 of 20
In optical physics, the physiological ability of the human eye lens to automatically adjust its focal length to clearly see objects situated at varying distances is termed as:
Question 11 of 20
Consider a circuit where three resistors of 2 Ohms, 4 Ohms, and 6 Ohms are connected in series. What is the total equivalent resistance of this circuit?
Question 12 of 20
Assertion (A): A ray of light travels significantly slower through a diamond compared to its speed through water. Reason (R): The refractive index of diamond is approximately 2.42, which is substantially higher than the refractive index of water at 1.33.
Question 13 of 20
Which of the following sets of physical properties constitutes the ideal material for manufacturing a permanent magnet?
Question 14 of 20
Electricity (Vidyut) forms the backbone of several administrative exams. Which of the following best defines its scope?
Question 15 of 20
Electrical Resistance (R) is the opposition offered by a material to the free flow of electrons. At the microscopic atomic scale, what is the primary cause of this resistance?
Question 16 of 20
Which of the following describes the standard voltage supplied to household appliances configured in a parallel circuit within India?
Question 17 of 20
Match List I (Key Optical Terminology) with List II (Associated Definition/Property) and select the correct code: List-I a. Concave Mirror b. Convex Mirror c. Negative Magnification d. Refraction List-II 1. Real and Inverted Image 2. Converging properties 3. Bending due to phase velocity change 4. Always forms virtual, diminished images
Question 18 of 20
A typical 2-marker question in the General Science Mains paper often requires candidates to draw distinct comparisons. According to the standard question formats, highlighting the differences between which two concepts is a classic example of this?
Question 19 of 20
Given below are two statements, one labeled as Assertion (A) and the other as Reason (R): Assertion (A): When light transitions from the vacuum of space into water, its speed drops below $3.00 imes 10^8 m/s$. Reason (R): Water is a denser material medium compared to a vacuum, which causes the velocity of electromagnetic waves to decrease. In the context of the above two statements, which one of the following is correct?
Question 20 of 20