Subject: PhysicsXGeneral

The surface of a lake is frozen in severe winter, but the water at its bottom is still liquid. What is the reason?

Consider the following statements: If there were no phenomenon of capillarity 1. it would be difficult to use a kerosene lamp 2. one would not be able to use a straw to consume a soft drink 3. the blotting paper would paper would fail to function 4. the big trees that we see around would not have grown on the earth Which of the following statements given above are correct?

Which of the following is/are cited by the scientists as evidence/evidences for the continued expansion of the universe? 1. Detection of microwaves in space 2. Observation of redshift phenomenon in space 3. Movement of asteroids in space 4. Occurrence of supernova explosions in space

Electrically charged particles from space travelling at speeds of several hundred km/sec can severely harm living beings if they reach the surface of the Earth. What prevents them from reaching the surface of the Earth?

A team of scientists at Brookhaven National Laboratory including those from India created the heaviest antimatter (anti-helium nucleus). What is/are the implication/ implications of the creation of antimatter? 1. It will make mineral prospecting and oil exploration easier and cheaper. 2. It will help probe the possibility of the existence of stars and galaxies made of antimatter. 3. It will help understand the evolution of the universe.

What is the role of ultraviolet (UV) radiation in the water purification systems? 1. It inactivates/kills the harmful microorganisms in water. 2. It removes all the undesirable odours from the water. 3. It quickens the sedimentation of solid particles, removes turbidity and improves the clarity of water.

The efforts to detect the existence of Higgs boson particle have become frequent news in the
recent past. What is/are the importance/importances of discovering this particle?
(1). It will enable us to under-stand as to why elementary particles have mass.
(2). It will enable us in the near future to develop the technology of transferring matter from
one point to another without traversing the physical space between them.
(3). It will enable us to create better fuels for nuclear fission.
Select the correct answer using the codes given below.

The known forces of nature can be divided into four classes, viz., gravity, electromagnetism, weak nuclear force and strong nuclear force. With reference to them, which one of the following statements is not correct?

Ball bearings are used in bicycles, cars, etc., because

In the context of modern scientific research, consider the following statements about ‘IceCube’,
a particle detector located at South Pole, which was recently in the news :
(1) It is he world’s largest neutrino detector, encompassing a cubic kilometer of ice.
(2) It is a powerful telescope to search for dark matter.
(3) It is buried deep in the ice.
Which of the statements given above is/are correct?