List of top Physics Questions

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?

Zinc oxide is best described as which type of oxide?

What type of conductor of electricity is pure water?

Which element has three isotopes that are each known by a different name?

On which conservation law does a rocket work?

Which of the following types of radiation carries the maximum energy?

Where is CAZRI (Central Arid Zone Research Institute) located?

What is the main constituent of coal gas?

Recoil of a gun is an example of which principle?

Which is the heaviest naturally occurring noble gas?

Aviation fuel for jet aeroplanes is a purified form of which fuel?

A piece of stone or iron traveling through space that enters the Earth's atmosphere is called a

Which device works on the principle of mutual induction?