Physics (light, electricity) MCQs for CET 12th Level
Practice 20 free Physics (light, electricity) questions under Basic Science — Science & Tech.
Strengthen your Physics (light, electricity) knowledge for CET 12th Level with curated MCQs. Switch between Hindi and English anytime.
CET 12th Level — Basic Science — Physics (light, electricity)
20 Questions • Instant results & explanations • Hindi & English
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Question 1 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 2 of 20
A laboratory experiment involves two copper wires of identical thickness. Wire X is 10 meters long, while wire Y is cut to be exactly 2 meters long. Assuming the temperature remains completely constant, how does the resistivity of wire Y compare to that of wire X?
Question 3 of 20
Which specific optical phenomenon forms the functional basis of the primary infrastructure backbone used in modern telecommunication networks?
Question 4 of 20
A diagnostic voltmeter connected across a heating element measures a potential difference of 24 Volts. If a steady electric current of 3 Amperes flows through this element, what is its electrical resistance under Ohm's Law?
Question 5 of 20
Given below are two statements, one labeled as Assertion (A) and the other as Reason (R): Assertion (A): A plane mirror produces a laterally inverted image. Reason (R): In a plane mirror, the left side of the object appears as the right side of the image due to the straight-line reflection of rays. In the context of the above two statements, which one of the following is correct?
Question 6 of 20
The scientific study of optics encompasses several core processes related to light. Which of the following is NOT typically a primary focus of this branch?
Question 7 of 20
Electricity (Vidyut) forms the backbone of several administrative exams. Which of the following best defines its scope?
Question 8 of 20
The total electrical resistance (R) of a cylindrical metal wire depends on its shape. If a technician stretches a uniform copper wire so its length (L) doubles while keeping its mass and volume constant, how will its resistance change?
Question 9 of 20
Which of the following topics is explicitly listed in the syllabus for Paper II (General Science) of the RAS Mains Examination?
Question 10 of 20
Assertion (A): The power of a convex lens is given a positive sign (+D). Reason (R): A convex lens is a converging lens, and according to convention, its focal length is measured as positive.
Question 11 of 20
Which of the following conditions are absolutely essential for Total Internal Reflection (TIR) to occur when a light ray travels between two transparent media?
Question 12 of 20
Assertion (A): Aluminum and Platinum are classified as paramagnetic materials. Reason (R): These materials have a small, positive magnetic susceptibility and are weakly attracted to a magnetic field.
Question 13 of 20
Assertion (A): Achieving high marks in descriptive science exams requires writing long, narrative paragraphs focusing heavily on the historical context of scientific discoveries. Reason (R): Evaluators expect precise scientific terminology, bullet points, and neat diagrams to demonstrate subject mastery.
Question 14 of 20
Match the Corrective Lens (List-I) with the corresponding Power Sign (List-II): List-I I. Convex Lens II. Concave Lens List-II P. Negative (-D) Q. Positive (+D) Select the correct combination:
Question 15 of 20
When defining the boundaries and characteristics of a magnetic field conceptually, which of the following statements is scientifically accurate?
Question 16 of 20
Which of the following describes the nature of the image formed when an object is placed in front of a mirror whose reflecting surface is a segment of an outwardly bulging hollow sphere?
Question 17 of 20
Which specific branch of physics forms the core operational foundation for Magnetic Resonance Imaging (MRI) machines used heavily in Medical Diagnostics?
Question 18 of 20
An incandescent bulb utilizes a Tungsten filament rather than Nichrome. What is the fundamental physical reason behind this specific material choice?
Question 19 of 20
Which of the following topics is NOT explicitly mentioned as part of the descriptive General Science syllabus for the administrative Mains examination?
Question 20 of 20