# Thermodynamics (KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics): Questions 14 - 18 of 32

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 268 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 200.00 or

## Question number: 14

» Thermodynamics » Thermal Equilibrium

Appeared in Year: 2014

MCQ▾

### Question

An ideal gas follows a process described by from (P1, V1, T1) to (P2, V2, T2) (C is a constant). Then –

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 15

» Thermodynamics » Thermal Equilibrium

Appeared in Year: 2013

MCQ▾

### Question

The bulk modulus of a gas is defined as. For an adiabatic process the variation of B is proportional to. For an ideal gas, n is –

### Choices

Choice (4) Response

a.

b.

0

c.

2

d.

1

## Question number: 16

» Thermodynamics » Carnot Engine and Its Efficiency

MCQ▾

### Question

A reversible engine converts of the heat input into work. When the temperature of the sink is reduced by 750 C, the efficiency of the engine is doubled. The temperatures in degree centigrade of the source and the sink are –

### Choices

Choice (4) Response

a.

102, 27

b.

95, 27

c.

100, 27

d.

112, 27

## Question number: 17

» Thermodynamics » Thermodynamic Processes

MCQ▾

### Question

1 g mole of an ideal gas at STP is subjected to a reversible adiabatic expansion to double its volume. Find the change in internal energy.

### Choices

Choice (4) Response

a.

1169.5 J

b.

969.5 J

c.

1069.72 J

d.

849.28 J

## Question number: 18

» Thermodynamics » Measurement of Temperature

MCQ▾

### Question

Two rods, one made of Aluminum and the other copper of the same length and across sectional area are joined together. (The thermal conductivity of copper is and aluminum is ). If the copper end is held at 1300 C and the aluminum end is held at 50 C, what is the junction temperature (assuming no other heat losses)?

### Choices

Choice (4) Response

a.

55.60 C

b.

86.60 C

c.

1000 C

d.

88.70 C

f Page