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

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

Master Physics (light, electricity) under Basic Science for CET 12th Level 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.

CET 12th Level — Basic Science — Physics (light, electricity)

20 Questions • Instant results & explanations • Hindi & English

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Question 1 of 20

To rectify the optical distortion caused by Astigmatism, which specialized type of lens is utilized?

Question 2 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.

Question 3 of 20

The human eye relies on an internal biological lens to function as an intricate optical instrument. What type of lens is naturally present in the human eye?

Question 4 of 20

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

Question 5 of 20

The speed of light is quantified as approximately 3 x 10^8 m/s. In which of the following environments does light achieve its absolute maximum velocity?

Question 6 of 20

An incandescent bulb utilizes a Tungsten filament rather than Nichrome. What is the fundamental physical reason behind this specific material choice?

Question 7 of 20

Soft iron is extensively used as the core material in the construction of electromagnets. Which specific properties make it suitable for this purpose?

Question 8 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 9 of 20

Which of the following devices does NOT fundamentally depend upon the heating effect of electric current?

Question 10 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 11 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 12 of 20

Which of the following optical lenses is exclusively used to correct Myopia (Near-sightedness)?

Question 13 of 20

Assume an engineer constructs a fully functional fluorescent tubelight containing the correct ionized gases, but intentionally omits the white phosphor coating applied to the inside of the glass tube. What would be the direct optical output of this compromised tubelight?

Question 14 of 20

Assertion (A): Total Internal Reflection is the foundational principle allowing optical fibers to bend and transmit internet data seamlessly across oceans. Reason (R): For Total Internal Reflection to function, the light beam must attempt to pass from a rarer medium into a denser medium at an angle less than the critical angle.

Question 15 of 20

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

Question 16 of 20

If you measure the speed of light accurately in a complete vacuum, it registers at 3 x 10^8 m/s. What single property of a new medium fundamentally dictates how much this speed will drop when the light enters it?

Question 17 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 18 of 20

Consider the following statements: 1. Modern Physics involves the study of macroscopic celestial bodies' gravitational pull. 2. Thermodynamics is the study of electric circuits. Which of the statements given above is/are NOT correct?

Question 19 of 20

Historically, the true nature of light was a subject of fierce scientific debate. How does modern physics fundamentally resolve this debate?

Question 20 of 20

The striking deep blue color observed in a clear daytime sky and the intense red color seen during sunsets are atmospheric effects primarily caused by which optical principle?

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