CSIR (Council of Scientific & Industrial Research) Physical Sciences: Questions 288  289 of 463
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Question number: 288
» Electronics and Experimental Methods » Filtering and Noise Reduction
Appeared in Year: 2012
Question
Band – pass and band – reject filters can be implemented by combining a low pass and a high pass filter in series and in parallel, respectively. If the cut – off frequencies of the low pass and high pass filter are and , respectively, the condition required to implement the band pass and band reject filter are, respectively – (December)
Choices
Choice (4)  Response  

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b. 


c. 


d. 


Question number: 289
» Thermodynamic and Statistical Physics » Ising Model
Appeared in Year: 2012
Question
Consider a one – dimensional Ising model with N spins, at very low temperature when almost all the spins are aligned parallel to each other. There will be a few spin flips with each flip costing an energy . In a configuration with spin flips, the energy of the system is and the number of configuration is ; varies from 0 to N. The partition function is – (December)
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

