Thermodynamics (KVPY Stream SB-SX (Class 12 & 1st Year BSC) Physics): Questions 27 - 30 of 30

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Question number: 27

» Thermodynamics » Thermodynamic Processes

MCQ▾

Question

The work required to compress adiabatically 2 g of air initially at NTP to 13 of its volume. Density of air at NTP = 0.00129 gcm-3 and CPCV=1.4 .

Choices

Choice (4) Response

a.

-108.54 J

b.

108.54 J

c.

54.27J

d.

-54.27 J

Question number: 28

» Thermodynamics » Concept of Temperature

MCQ▾

Question

A solid copper sphere cools at the rate of 3.20 C per minute, when its temperature is 1770 C. Find the rate at which another solid copper sphere of twice the radius lose its temperature at 3770 C, if in both the cases, the room temperature is maintained at 270 C.

Choices

Choice (4) Response

a.

9.290Cmin1

b.

7.290C min-1

c.

8.290Cmin1

d.

6.290Cmin1

Question number: 29

» Thermodynamics » Concept of Temperature

MCQ▾

Question

A sound wave passing through air at NTP produces a pressure of 0.002dyne/cm2 during a compression. The corresponding change in temperature (given γ = 1.5 and assume gas to be ideal) is –

Choices

Choice (4) Response

a.

1.93×107K

b.

1.93×106K

c.

1.93×108K

d.

All of the above

Question number: 30

» Thermodynamics » Work in Thermodynamic Process and PV Diagrams

Appeared in Year: 2015

MCQ▾

Question

An ideal gas undergoes a circular cycle centered at 4atm, 4 lit as shown in the diagram. The maximum temperature attained in this process is close to,

PV diagram of a circular cycle

PV Diagram of a Circular Cycle

In figure an ideal gas undergoes a circular cycle centered at 4 atm and 4 lit is shown by PV diagram.

Choices

Choice (4) Response

a.

36R

b.

30R

c.

16R

d.

24R

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