CSIR (Council of Scientific & Industrial Research) Physical Sciences: Questions 420  422 of 463
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Question number: 420
» Classical Mechanics » Dynamical System
Appeared in Year: 2016
Question
A ball of mass is dropped from a tall building will zero initial velocity. In addition to gravity, the ball experiences a damping force of the form , where is its instantaneous velocity and is a constant. Given the values , and , the distance travelled (in meters) in time in seconds, is: (December)
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 421
» Electromagnetic Theory » Electromagnetic Waves in Free Space
Appeared in Year: 2016
Question
The electric field of an electromagnetic wave is , where and are positive constants. This represents: (December)
Choices
Choice (4)  Response  

a.  a linear polarised wave travelling in the positive z – direction 

b.  a circularly polarised wave travelling in the negative z – direction 

c.  an elliptically polarised wave travelling in the negative z – direction 

d.  an unpolarised wave travelling in the positive z – direction 

Question number: 422
» Mathematical Methods of Physics » Finite Difference Methods
Appeared in Year: 2016
Question
Given the values , the approximate value of , computed by Newton’s forward difference method, is: (December)
Choices
Choice (4)  Response  

a.  0.804 

b.  0.776 

c.  0.788 

d.  0.798 
