In a DC motor, the split-ring commutator:

Reverse the direction of current in the rotating armature coil every half rotation

Increase the magnetic field strength inside the core

Convert alternating current into direct current

Prevent the motor coils from overheating

Diamond has an absolute refractive index of 2.42. This means:

The speed of light in vacuum is 2.42 times the speed of light in diamond

Light travels 2.42 times faster in diamond than in air

The speed of sound in diamond is 2.42 m/s

Diamond absorbs 2.42% of incident luminous energy

By Newton’s second law, net external force is proportional to the:

Rate of change of linear momentum

Total kinetic energy of the body

If the distance between two point masses is tripled, gravitational force becomes:

It decreases to 1/9th of its original value

It decreases to 1/3rd of its original value

Light travels obliquely from an optically denser to a rarer medium. It:

Bends away from the normal and speeds up

Bends towards the normal and slows down

Passes straight without any refraction

Reflects entirely along the same path at all angles

If a uniform wire’s length doubles at constant cross-sectional area, its resistance:

The resistance remains unchanged

The resistance increases by four times

Ignoring air resistance, a body freely falling near Earth has:

Uniform acceleration of approximately 9.8 m/s²

Exponentially increasing acceleration

For an object at C (centre of curvature) of a concave mirror, the real image forms:

Between focus (F) and center of curvature (C)

Which phenomenon causes stars to twinkle?

Atmospheric refraction through air layers of varying optical density

Total internal reflection inside cosmic clouds

Atmospheric dispersion of stellar white light

Diffuse reflection from atmospheric dust

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RRB PH UT29 – General Science Practice Test 1: Physics

Pooja Agnihotri November 14, 2026 5 views 30 Questions

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About This Practice Test
This online practice test thoroughly evaluates candidates’ mastery of General Science Physics based on the CBSE Class 10 NCERT curriculum, aligned with the non-technical section of the RRB Paramedical CBT (CEN 05/2026). Mastering core physical concepts including Newton’s laws of motion, gravitation, work-energy calculations, optics (reflection, refraction, and lenses), Ohm’s law, and electromagnetism is crucial for securing top aggregate scores. Regular practice with these bilingual, exam-calibrated questions sharpens numerical accuracy, reinforces scientific laws, and ensures confidence for the live computer-based test.

Syllabus Covered
Laws of Motion & Gravitation: Newton’s second law, linear momentum, acceleration due to gravity variations, and inverse-square relationships.

Optics: Spherical mirrors, lens formula, optical power (dioptres), refractive index, atmospheric refraction, and myopic vision correction.

Electricity & Circuits: Ohm’s law, resistance in series and parallel, Joule heating, electric fuses, and commercial energy units (kWh).

Work, Energy & Power: Potential and kinetic energy formulas, zero-work conditions (perpendicular force), and electrical power consumption.

Magnetism & Sound: Fleming’s left-hand rule, electric motors and generators, audible human hearing limits, and ultrasound wave properties.

Applicable Examinations
RRB Paramedical (Pharmacist Entry Grade – CEN 05/2026, Nursing Superintendent, Lab Assistant Gr II)

Central Recruitment Boards: DSSSB Pharmacist, ESIC Pharmacist, AIIMS Paramedical, CGHS

State Paramedical Recruitment Boards, Directorate of Health Services (DHS), and Railway Group-C / Level-5 CBTs

Test Instructions & Features
Structure: 30 Questions

Format: Timed Online Test | Bilingual (English / Hindi)

Review: Detailed Explanations for Every Question

Analytics: Instant Scorecard & Performance Analysis

Written & Verified by Pooja Agnihotri

Expert Faculty

Subject Matter Expert & Content Creator at Solotutes. Dedicated to providing highly accurate and syllabus-oriented study materials for your exam preparation.