Physics (light, electricity) MCQs for Rajasthan SI
Practice 20 free Physics (light, electricity) questions under Basic Science — Science & Tech.
Strengthen your Physics (light, electricity) knowledge for Rajasthan SI with curated MCQs. Switch between Hindi and English anytime.
Rajasthan SI — Basic Science — Physics (light, electricity)
20 Questions • Instant results & explanations • Hindi & English
0 / 20
Question 1 of 20
If the formula for linear magnification is given as $m = -v/u = h_i/h_o$, what specific conclusion can a physicist draw if the calculated mathematical value of 'm' turns out to be a positive number?
Question 2 of 20
The phenomenon where a beam of light becomes visible as it passes through a colloidal solution or a dusty room is termed as:
Question 3 of 20
In the study of modern physics, wave-particle duality applies to light. Which of the following best summarizes this duality?
Question 4 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 5 of 20
A Voltmeter is deployed in electric circuits to check performance metrics. What is the correct installation setup and the required internal design criteria for an ideal voltmeter?
Question 6 of 20
A uniform cylindrical laboratory conductor wire has a default electrical resistance of 10 Ω. If this wire is uniformly drawn out and stretched until its final length becomes exactly three times (3L) its starting baseline length, what will be its final Resistance and its final Resistivity respectively?
Question 7 of 20
Review the following optical statements and select the correct combination using the codes below: Statement 1: A thin soap bubble shows bright colors in sunlight due to the phenomenon of light wave interference. Statement 2: Polarization isolates light vibrations to a single plane, proving light travels as a longitudinal wave. Statement 3: An astronomical telescope uses a large objective convex lens alongside a smaller eyepiece lens.
Question 8 of 20
Consider the following statement: 'The energy conversion taking place inside a motor is precisely the opposite of the energy conversion occurring inside a generator.' In the context of the RAS Preliminary Examination, evaluating this type of factual clarity typically involves which type of question format?
Question 9 of 20
Match List-I (Optical Condition/Instrument) with List-II (Associated Component/Correction Lens) and select the correct answer using the codes given below: List-I: (a) Myopia Correction (b) Periscope Design (c) Astronomical Telescope (d) Hypermetropia Correction List-II: (i) Large Objective Convex Lens and smaller Eyepiece (ii) Concave Lens (iii) Convex Lens (iv) Two Plane Mirrors angled at 45 degrees
Question 10 of 20
When examining the fundamental definition of refraction, which specific physical property undergoes an alteration to induce the 'bending' effect?
Question 11 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 12 of 20
Consider the following analytical statements regarding the scattering of visible light in Earth's atmosphere: 1. The sky appears prominently blue because short-wavelength blue light is scattered extensively by oxygen and nitrogen molecules. 2. Danger signals utilize red-colored lighting because red light, possessing the longest visible wavelength, is scattered the least by dense fog. Which of the statement(s) given above mathematically aligns with Rayleigh's law of scattering?
Question 13 of 20
A student sitting at the back of a lecture hall is unable to clearly read the writing on the blackboard but can read a textbook placed on their desk perfectly. Which optical lens must be medically prescribed to correct this specific visual defect?
Question 14 of 20
Match List-I (Device) with List-II (Energy Conversion) and select the correct answer using the codes given below: List-I a. Electric Motor b. Electric Generator c. Solar Cell d. Battery List-II 1. Chemical to Electrical 2. Light to Electrical 3. Mechanical to Electrical 4. Electrical to Mechanical
Question 15 of 20
A dentist requires a highly specific mirror to properly examine a patient's teeth. Which mirror is utilized, and what type of image does it produce?
Question 16 of 20
A patient is prescribed a lens with P = -2.5 D. Calculate the focal length of the prescribed lens.
Question 17 of 20
A current of 2 A flows through a resistor when a potential difference of 10 V is applied across it. The resistance is:
Question 18 of 20
Consider the mathematical expressions used in basic optics. If 'f' represents focal length, 'v' represents image distance, and 'u' represents object distance, which option correctly states the Mirror Formula and the Lens Formula respectively?
Question 19 of 20
Which specific physical interaction is the core subject of the branch 'Chumbakatva'?
Question 20 of 20