GATE (Graduate Aptitude Test in Engineering) Physics (PE): Questions 559 - 561 of 1823
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Question 559
Appeared in Year: 2013
Question MCQ▾
The Lagrangian of a system with one degree of freedom is given by , where and are non – zero constants. If denotes the canonical momentum conjugate to then which one of the following statements is CORRECT?
Choices
Choice (4) | Response | |
---|---|---|
a. | and it is a conserved quantity | |
b. | and it is a conserved quantity | |
c. | and it is not a conserved quantity | |
d. | and it is not a conserved quantity |
Question 560
Appeared in Year: 2011
Question MCQ▾
A Carnot cycle operates on a working substance between two reservoirs at temperatures and with . During each cycle an amount of heat is extracted from the reservoir at and an amount is delivered to the reservoir at . What of the following statements is incorrect?
Choices
Choice (4) | Response | |
---|---|---|
a. | Work done in 1 cycle is | |
b. | ||
c. | Entropy of the hotter reservoir decreases | |
d. | Entropy of the universe (consisting of the working substance and the two reservoirs) increases |
Question 561
Appeared in Year: 2011
Question MCQ▾
If the isothermal compressibility of a solid is , the pressure required to increase its density by is approximately
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |