# Thermodynamics (KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics): Questions 23 - 26 of 32

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## Question number: 23

» Thermodynamics » Measurement of Temperature

MCQ▾

### Question

A 10 kW drilling machine is used to drill a hole in a metal block of mass 15 kg. Assuming that 30 % power is lost in the machine, calculate the rise in temperature of the block in 4 minutes. Specific heat capacity of metal = 0.4 Jg-1 K-1.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 24

» Thermodynamics » Thermodynamic Processes

Appeared in Year: 2015

MCQ▾

### Question

The state of an ideal gas was changed isobarically. The graph depicts three such isobaric lines. Which of the following is true about the pressures of the gas?

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 25

» Thermodynamics » Concept of Temperature

MCQ▾

### Question

A body cools down from 600 C to 500 C in 10 minutes. Its temperature comes down to 450 C in next ten minutes. The temperature of surroundings is –

### Choices

Choice (4) Response

a.

150 C

b.

400 C

c.

300 C

d.

550 C

## Question number: 26

» Thermodynamics » Work in Thermodynamic Process and PV Diagrams

Appeared in Year: 2013

MCQ▾

### Question

The three processes in a thermodynamic cycle shown in the figure are: Process 1⟶ 2 is isothermal; Process 2⟶ 3 is isochoric (volume remains constant); Process 3 ⟶ 1 is adiabatic. The total work done by the ideal gas in this cycle is 10 J. The internal energy decreases by 20 J in the isochoric process. The work done by the gas in the adiabatic process is –20 J. The heat added to the system in the isothermal process is

### Choices

Choice (4) Response

a.

0 J

b.

20 J

c.

10 J

d.

30 J

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