Science Physics MCQ-167

General Science-Physics Practice Questions for CivilsPrelims, RBI, DelhiPolice, NDA, UPSC, UPPSC, CDS, SSC Exams

A person suffering from myopia (short sightedness)


A person suffering from myopia cannot see distant object clearly because the eye lens form the image of a distant object is


A person with defective eyesight is unable to clearly see objects nearer than 0 m. He wants to read a book placed at a distance of 50 cm. What kind of lens does he require for his spectacles and what must be the power of the lens?


A photocell converts


Apiece of metal feels hotter than a piece of wood in summer because


Apiece of rock was brought from moon to earth. Then


A plant with green leaves placed in red light will appear


A p-type semiconductor has an excess of


A Pyrex tumbler does not crack when hot water is poured into it because Pyrex


A radar that detects the presence of an enemy aircraft uses


A radioactive element emits an alpha particle. The mass number of the element, after emission


A rainbow is produced when sunlight falls on drops of rain. Which of the following physical phenomena is responsible for this?

(1) Diffusion
(2) Refraction

(3) Internal reflection


A ray of light is incident at an angle of incidence i 1 at one face of an equilateral glass prism and emerges out at an angle of emergence i2 from the second face. If the prism is at the minimum deviation position,


A rectifier is used for


Ared light is used in a traffic signal because


A resonant system has a fundamental frequency of 100 Hz. If the next higher frequency that gives a resonance of 300 Hz and 500 Hz, the system could be


A rocket is to be launched to put a payload in an equatorial orbit from an equatorial launching site. Which of the following statements will then be correct?


A.rocket works on the principle of conservation of


A satellite is moving around the earth in a stable circular orbit. Which one of the following statements is not true for such a satellite?


A semiconductor is material which is


A shell explodes and many pieces fly off in different directions. The following is conserved.


A shell, initially at rest, suddenly explodes into two equal fragments A and B. Which one of the following is observed?


A shooting star is basically a


Which of the following quantity is expressed as force per unit area?


A simple pendulum hangs from the ceiling of a train. The sting is inclined towards the rear of the train. What is the nature of motion of the train?