# Thermodynamics (KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics): Questions 1 - 3 of 32

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## Question number: 1

» Thermodynamics » Work in Thermodynamic Process and PV Diagrams

Appeared in Year: 2010

MCQ▾

### Question

An ideal gas is made to undergo a cycle depicted by the PV diagram alongside. The curved line from A to B is an adiabatic.

Then –

### Choices

Choice (4) Response

a.

The efficiency of this cycle is given by unity as no heat is released during the cycle

b.

Heat is absorbed in the upper part of the straight line path and released in the lower part

c.

If T1 and T2 are the maximum and minimum temperatures reached during the cycle, then the efficiency is given by

d.

The cycle can only be carried out in the reverse of the direction shown in figure

## Question number: 2

» Thermodynamics » Work in Thermodynamic Process and PV Diagrams

Appeared in Year: 2010

MCQ▾

### Question

An ideal gas with constant heat capacity is made to carry out a cycle that is depicted by a triangle in the figure given below.

The following statement is true about the cycle –

### Choices

Choice (4) Response

a.

The efficiency is given

b.

Heat absorbed in part AC is given by

c.

Net heat absorbed in the cycle is

d.

The efficiency is given by

## Question number: 3

» Thermodynamics » Measurement of Temperature

Appeared in Year: 2011

MCQ▾

### Question

Two rods, one made of copper and the other steel of the same length and cross sectional area are joined together. (The thermal conductivity of copper is 385 J s–1 m –1 K-1 and steel is 50 J s–1 m –1K–1) If the copper end is held at 1000C and the steel end is held at 00C, what is the junction temperature (assuming no other heat losses)?

### Choices

Choice (4) Response

a.

880C

b.

120C

c.

500C

d.

730C