List of top Questions asked in PGIMER- 2025

Name the instrument used to measure the specific gravity (relative density) of a liquid.

Which optical instrument is used to see very small objects that are not visible to the naked eye?

At which place on the Earth's surface is the acceleration due to gravity maximum, the poles or the equator?

Between two charged particles such as two electrons, which force between them is stronger, the gravitational force of attraction or the electrostatic force?

Which form of energy does a body possess because of its motion, that is, the energy that is used to move an object?

Is acceleration a vector quantity or a scalar quantity?

What is the dimensional formula of strain?

What is the SI unit of magnetic flux?

Which temperature scale has its zero point set at absolute zero, the lowest possible temperature?

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?