List of top Physics Questions asked in PGIMER

What did C. V. Raman discover, the phenomenon for which he was awarded the Nobel Prize in Physics?

Astronomers and physicists need a unit to describe extremely small distances, such as the size of an atomic nucleus. Which unit is commonly used for such tiny lengths, and what is its value in metres?

As you move higher above the Earth's surface, that is, as altitude increases, how does the acceleration due to gravity (g) change?

A satellite is placed in a circular orbit very close to the Earth's surface, so that its orbital radius is almost equal to the Earth's radius. What is the approximate time period of this satellite?

A satellite of mass m moves in a circular orbit of radius r around the Earth with orbital speed v. What is the expression for its angular momentum about the centre of the Earth?

Van der Waals forces are weak attractive forces between molecules. At approximately what distance scale between molecules do these forces become significant?

Specific gravity (relative density) of a substance is defined as the ratio of its density to the density of water. What is the SI unit of specific gravity?

Blotting paper quickly soaks up ink when pressed against a wet page. Which physical phenomenon is responsible for this absorption?

Physicists need a convenient unit to state the size of an atomic nucleus. In which unit are nuclear sizes usually expressed?

A light-year is a unit commonly used in astronomy to describe the distances between stars and galaxies. What physical quantity does the light-year actually measure?

Lie-detection tests measure physiological changes in a person, such as pulse rate, blood pressure, and skin conductivity, while they answer questions. Which device is used to carry out this test?

A satellite is put into a circular orbit very close to the surface of the Earth, just outside the atmosphere. What is its orbital speed, and how is this speed related to the acceleration due to gravity and the radius of the Earth?

Newton's third law of motion states that for every action there is an equal and opposite reaction. Do the action force and the reaction force act on the same body or on two different bodies?

The candela is one of the seven base units in the SI system. Which physical quantity does the candela measure?

Travellers on a hot road or in a desert sometimes see what looks like a pool of water in the distance, an illusion known as a mirage. What physical phenomenon causes a mirage?

LEDs, light emitting diodes, are widely used in torches, indicator lamps, and display screens. What kind of light do the LEDs used in electronic devices emit?

Mercury, not water, is used as the liquid inside common laboratory and clinical thermometers, even though water has a higher specific heat. What are the physical reasons mercury is preferred over water as a thermometric liquid?

Alpha Centauri is the star system nearest to our Sun. About how long does light from Alpha Centauri take to travel to Earth, and what does this tell us about its distance?

In physics, quantities are classified as either scalars or vectors. What property or properties completely describe a scalar quantity?

In physics, quantities are classified as either scalars or vectors. What property or properties completely describe a vector quantity?

What is the metric, that is SI, unit of force, and how is it defined in terms of mass and acceleration?

Which of the following is not a unit of distance?

Which of the following remains constant while throwing a ball upward?

At what temperature does pure water freeze on the Fahrenheit scale?

Which vitamin is abundant in citrus fruits?