GATE (Graduate Aptitude Test in Engineering) Physics: Questions 220  222 of 622
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Question number: 220
» Thermodynamics and Statistical Physics » First and Second Order Phase Transitions
Appeared in Year: 2013
Question
Across a first order phase transition, the free energy is –
Choices
Choice (4)  Response  

a.  Proportional to the temperature 

b.  Such that the first derivative with respect to temperature is continuous 

c.  A continuous function of the temperature but its derivative is discontinuous 

d.  A discontinuous function of the temperature 

Question number: 221
» Electromagnetic Theory » Solutions of Electrostatic and Magnetostatic Problems
Appeared in Year: 2011
Question
A uniform surface current is flowing in the positive direction over an infinite sheet lying in plane. The direction of the magnetic field is –
Choices
Choice (4)  Response  

a.  Along for and along for 

b.  Along for and along for 

c.  Along for and along for 

d.  Along for and along for 

Question number: 222
» Electromagnetic Theory » Interference
Appeared in Year: 2013
Question
Interference fringes are seen at an observation plane , by the superposition of two plane waves and , where and are real amplitudes. The condition for interference maximum is –
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

