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CET 12th Level — Physics (light, electricity) MCQs

Practice 20 free physics (light, electricity) multiple choice questions for CET 12th Level exam. Instant answers with explanations in Hindi and English.

Master Physics (light, electricity) under Basic Science for CET 12th Level with our curated MCQ set. Every question follows real Rajasthan exam patterns. 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

Resistivity (ρ) and Resistance (R) are closely related terms that describe different aspects of electrical behavior. Which statement correctly defines resistivity and isolates it from resistance?

Question 2 of 20

Which branch of physics is described as a 'high-yield topic' that involves the study of light, its properties, and optical instruments?

Question 3 of 20

Which specific type of corrective lens is universally prescribed to correct Myopia (Near-sightedness)?

Question 4 of 20

Potential Difference (Voltage, V) between two distinct points in an electric field is fundamentally defined as:

Question 5 of 20

Vehicle manufacturers install convex mirrors as rear-view mirrors rather than plane mirrors. What is the fundamental scientific reason for this design choice?

Question 6 of 20

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

Question 7 of 20

When addressing common examination traps regarding electrical wiring, a student assumes cutting a wire halves its resistivity. What is the fundamental flaw in this reasoning?

Question 8 of 20

Consider the following statements regarding medical diagnostic technologies: 1. Magnetic Resonance Imaging (MRI) utilizes strong magnetic fields to capture images of internal body structures. 2. X-rays employ high-frequency electromagnetic waves primarily to visualize skeletal structures. Which of the statements given above is/are correct?

Question 9 of 20

If an image formed by a spherical mirror possesses a positive linear magnification (+m), what logical conclusion can be drawn regarding the image's characteristics?

Question 10 of 20

A student finds that their prescribed glasses have a power of +3.0 D. Which vision defect is the student most likely suffering from?

Question 11 of 20

According to the fundamental laws of reflection, which mathematical relationship always holds true for any reflecting surface?

Question 12 of 20

Consider the following statements regarding Cartesian sign conventions: 1. The pole of the spherical mirror is taken as the origin. 2. Distances measured against the direction of incident light are negative. 3. Image distance (v) is always positive for real images. Which of the above is/are mathematically correct?

Question 13 of 20

Assertion (A): For candidates preparing for the RSSB Police SI and Patwari exams, deep theoretical understanding of Quantum Physics is critical. Reason (R): The RSSB numerical focus derives directly from the NCERT Class 10 textbook concepts like equivalent resistance and mirror formulas.

Question 14 of 20

Given the relationship established by Joule's Law of heating, what will happen to the heat produced in a conductor if the electric current flowing through it is doubled, assuming resistance and time remain strictly constant?

Question 15 of 20

Consider the following statements regarding the scattering of light: 1. Shorter wavelengths scatter less efficiently than longer wavelengths. 2. The red color of sunrise is due to the scattering away of blue light. Which of the statements is/are correct?

Question 16 of 20

What is the scientific term for the optical phenomenon where white light splits into its constituent seven colors (VIBGYOR) upon passing through a transparent medium like a prism?

Question 17 of 20

A patient is prescribed a lens with P = -2.5 D. Calculate the focal length of the prescribed lens.

Question 18 of 20

Explaining the specific 'Nature of EM (Electromagnetic) waves' typically corresponds to which category of question format in State Administrative descriptive examinations?

Question 19 of 20

Consider the mathematical rule for multiple image formation using mirrors. If two mirrors are kept at an angle such that the ratio 360/θ is an odd integer, the formula n = (360/θ) - 1 applies primarily to the condition mentioned in the text where:

Question 20 of 20

Assertion (A): It is impossible to generate reliable internal body images of dense skeletal structures without the use of extremely strong magnetic fields. Reason (R): X-ray technology primarily utilizes high-frequency electromagnetic waves to visualize bones.

More Basic Science Subtopics

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