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Physics questions and answers

Browse questions about Physics, with answers and explanations.

239 questions

Electric Current and Its Effects39 questionsElectricity and Magnetism4 questionsFluid Mechanics5 questionsForce and Pressure31 questionsGravitation11 questionsHeat and Thermodynamics13 questionsLight and Optics14 questionsMechanical Properties of Solids1 questionsModern Physics3 questionsMotion and Forces1 questionsNuclear Physics4 questionsOptics1 questionsRotational Motion2 questionsScientific Discoveries27 questionsSound15 questionsSpace Science and Technology7 questionsThermal Physics8 questionsUnits and Measurements30 questionsWaves and Oscillations13 questionsWork and Energy10 questions

Questions

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What is the meaning of the Greek origin word, ‘Elektron’?

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Which process produces radiogenic argon-40 in the Earth’s crust?

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Who worked with Ernest O. Lawrence on the invention and early development of the cyclotron?

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In 1995, with whom did Eric Cornell experimentally produce the first Bose-Einstein condensate in a rarefied gas of rubidium atoms at extremely low temperatures?

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Which listed Nobel laureate is associated with experimental research on cathode rays produced in low-pressure electrical discharge tubes?

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Who developed the principle of holography in 1947 while seeking to improve electron-microscope resolution?

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In which year did Robert Brown make his well-known observations of irregular microscopic particle motion in a liquid?

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Using the NCERT room-temperature specific-heat table, identify the incorrect substance–specific heat pair, in J kg⁻¹ K⁻¹.

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Assertion (A): Magnetic lines of force inside a bar magnet run from the South pole to the North pole. Reason (R): Magnetic field lines…

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For a charged particle moving perpendicular to a uniform magnetic field, with charge magnitude and magnetic-field strength fixed, the radius of its circular path…

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Which listed thermionic electron-beam vacuum tube is used as a microwave amplifier based on velocity modulation?

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Statement I: The Dirac equation, derived in 1928, combines quantum theory and special relativity to describe electrons moving at relativistic speeds. Statement II: Bernoulli's…

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Statement I: An anemometer is used to measure wind speed. Statement II: A transmissometer is a historical wind-speed instrument predating anemometers. Which statements are…

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Statement I: In modern notation, E₀=mc² expresses the rest-energy equivalent of mass. Statement II: Einstein derived mass–energy equivalence in1905 as a consequence of special…

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If the final position of an object is the same as its initial position, what will be the displacement of the object?

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Identify the change of state in which matter skips the liquid phase and converts straight from gas to solid.

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At one atmosphere and ordinary room temperature, what change does solid carbon dioxide (dry ice) undergo?

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Which of the following demonstrates cooling caused by evaporation? I. Pouring acetone on the palm II. Sprinkling water on the roof after a hot…

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Which listed quantity is not among the four factors named in NCERT’s introductory discussion of the rate of evaporation?

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The moment of inertia of a rigid body about a specified axis is best described as:

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Statement I: ISRO is developing spark-torch ignition for future LOX–methane rocket stages with multiple-restart capability. Statement II: Improved ignition reliability is one of the…

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In the case of a rigid body rotating about a fixed axis, the angular velocity of every particle in the body is:

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Consider the following statements: 1. The Aditya-L1 mission was launched to replace the INSAT series of weather satellites. 2. Aditya-L1 successfully entered a Halo…

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