Science Physics MCQ-172

General Science-Physics objective Questions for RBI, UPSC, CDS, JPSC, NDA, UPPSC, SSC, CivilsPrelims Exams

At which temperature super-conductivity can be of tremendous economic interest saving billions of rupees ?


These days yellow lamps are frequently used as street light. Which one of the following is used in these lamps ?


The newly discovered high temperature superconductors are


Stars obtain their energy from

Nuclear fusion
Gravitational contraction
Chemical reaction
Nuclear fission

Select your answer from the codes given below


What is the source of electric energy in an artificial satellite ?


Assertion (A): Woollen clothes keep us warm. Reason (R) : Wool fibres are made of a particular protein which is a bad conductor of heat.


Which one of the following is not InfoTech terminology ?


Which one of the following pairs is correctly matched ?


Assertion (A) : A black hole is an astronomical entity that cannot be seen by telescope. Reason (R) : The gravitational field on a black hole is so strong that it does not even light to escape.


Which one of the following is not correctly matched ?


The gas used in discharge tubes for optical decoration and advertising is


Consider the following statements :

1 . Fibre optics is based on the principle of total internal reflection .
2 . In optical fibre communication system power consumption is extremely low .
3 . Optical fibre communications are free from radio frequency interference .
4 . In India, Reliance group of Industries is engaged in the manufacture of optical fibre .

Of these statements


Which one of the following pairs is not correctly matched ?


Name the indigenously built multi barrel rocket launcher which was test fired in March 1999


In computer jargon, RAM refers to


Electric current passing through a metallic wire generates heat because of


Concave mirrors are used as shaving mirrors because they


Match list I with list II and select the correct answer using the codes given below the lists


Assertion (A): A crow sitting on high tension wire ‘flies away when the current is switched on.

Reason (R): When the current is switched on, the crow experiences an electrical shock.


Assertion (A) : Sun glasses have curved surfaces but they do not have any power. Reason (R) : In a sun glass, one surface is concave while the other is convex.


Machine parts get jammed in winter, because


Match list I with list II and select the correct answer using the codes given below the lists :

List I (Theory)

(a) Theory of nuclear fission
(b) Big Bang theory
(c) Quantum theory of matter
(d) Wave theory of light

List II (Scientist)

George Gamow
W. Heisenberg
Bohr and Wheeler
E. Huygens
(a) (b) (c) (d)


According to Einstein’s theory of relativity, when a body moves with a velocity comparable to the velocity of light, its


Cyclotron is a device which


Small droplets of a liquid are spherical in shape because of