Thermodynamic and Statistical Physics [CSIR (Council of Scientific & Industrial Research) Physical Sciences]: Questions 21 - 24 of 89
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Question 21
Appeared in Year: 2014
Question MCQ▾
Let ; where and are independent and identically distributed Gaussian random variables of mean and standard deviation . Then is – (June)
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | 1 | |
d. |
Question 22
Appeared in Year: 2014
Question MCQ▾
When a gas expands adiabatically from volume and by a quasi – static reversible process, it cools from temperature to . If now the same process is carried out adiabatically and irreversibly, and is the temperature of the gas when it has equilibrated, then – (December)
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |
Question 23
Appeared in Year: 2011
Question MCQ▾
If the number density of a free electron gas in three electron gas in three dimensions is increase eight times, its Fermi temperature will –
(December)
Choices
Choice (4) | Response | |
---|---|---|
a. | Increase by a factor of 4 | |
b. | Decrease by a factor of 4 | |
c. | Decrease by a factor of 8 | |
d. | Increase by a factor of 8 |
Question 24
Appeared in Year: 2011
Question MCQ▾
The internal energy E of a system is given by , where b is a constant and other symbols have their usual meaning. The temperature of this system is equal to – (December)
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |