Exam NamePhysics QUESTIONS
DescriptionPhysics QUESTIONS and Answers exams contains the questions from various competitive exams.These questions are the part of previous year paper.These kind of questions would be helpful in preparing for exams like IAS, PCS, UPSC, NDA, CDS SSC, RRB, PSC, IBPS

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Question: Natural radioactivity was discovered by _________________

Answer:Henri Becquerel

Question: Mercury is commonly used as a thermometric fluid rather than water because _________________

Answer:mercury has greater visibility than water

Question: Suitable impurities are added to a semiconductor depending on its use. This is done in order to

Answer:increase its electrical conductivity

Question: Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit _________________

Answer:visible light

Question: Light from the star, Alpha Centauri, which is nearest to the earth after the sun, reaches the earth in _____________

Answer:4.2 years

Question: Planets are _________________

Answer:non-luminous heavenly bodies

Question: When a moving bus stops suddenly, the passenger are pushed forward because of the

Answer:inertia of the passengers

Question: The buoyancy depends on

Answer:the mass of the liquid displaced

Question: Oil raise up the wick in a lamp. The principle involves _________________

Answer:capillary action phenomenon

Question: On a rainy day, small oil films on water show brilliant colours. This is due to _________________


Question: RADAR is used for _________________

Answer:detecting and locating the position of objects such as aeroplanes

Question: Siphon will fail to work if _________________

Answer:the level of the liquid in the two vessels are at the same height

Question: Intensity of sound at a point is _________________ its distance from the source.

Answer:inversely proportional to square of

Question: Sir C.V. Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation?


Question: Stars which appear single to the naked eye but are double when seen through a telescope are ________________


Question: Mirage is due to _________________

Answer:unequal heating of different parts of the atmosphere

Question: Weight of an object put in a satellite orbiting in space around the earth is

Answer:reduced to zero

Question: Radiocarbon is produced in the atmosphere as a result of _________________

Answer:collision between fast neutrons and nitrogen nuclei present in the atmosphere

Question: Lux is the SI unit of _____________

Answer:intensity of illumination

Question: One watt-hour is equivalent to ________________

Answer:3.6 x 103 J