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

Edit

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

Edit

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.

Edit