CSIR (Council of Scientific & Industrial Research) Physical Sciences: Questions 50  52 of 463
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Question number: 50
» Electromagnetic Theory » Interference
Appeared in Year: 2012
Question
Consider the interference of two coherent electromagnetic waves whose electric field vectors are given by and where is the phase difference. The intensity of the resulting wave is given by, where is the time average of. The total intensity is – (December)
Choices
Choice (4)  Response  

a. 


b. 


c.  0 

d. 


Question number: 51
» Mathematical Methods of Physics » Poles, Residues & Evaluation of Integrals
Appeared in Year: 2014
Question
A time – dependent current (where K is a constant) is switched on at in an infinite current – carrying wire. The magnetic vector potential is at a perpendicular distance ‘a’ from the wire. The magnetic vector potential at a perpendicular distance a from the wire is given by – (June)
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Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 52
» Thermodynamic and Statistical Physics » Planck's Distribution Law
Appeared in Year: 2013
Question
The speed of the molecules of mass m of an ideal gas obeys Maxwell’s velocity distribution law at an equilibrium temperature T. Let denote the components of the velocity and the Boltzmann constant. The average value of where and are constant, is – (December)
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

