| 1 |
The potential energy to the molecules of an ideal gas is considered to be. |
- A. Maximum
- B. Zero
- C. 1/2 kx<sup>2</sup>
- D. 1/2 kx
|
| 2 |
An ideal reversible heat engine has |
- A. 100% efficiency
- B. Highest efficiency
- C. 80%
- D. 90%
|
| 3 |
The unit o pressure of gas is |
- A. Nm<sup>-2</sup>
- B. Pascal
- C. Atmosphere
- D. All of these
|
| 4 |
Transformation of heat other forms of energy is discussed in |
- A. Thermal physics
- B. Thermodynamics
- C. Atomic physics
- D. Nuclear physics
|
| 5 |
The increase in thermal pollution of environment means. |
- A. Increase in the entropy
- B. Decrease in the entropy
- C. Entropy remains constant
- D. Entropy becomes zero
|
| 6 |
S.I Unit of pressure of gas is. |
- A. Nm
- B. N.m
- C. N2/m
- D. N3m
|
| 7 |
For an ideal gas, the internal energy is directly proportional to. |
- A. Pressure
- B. volume
- C. Mass
- D. Temperature
|
| 8 |
A finite volume of gas consists of |
- A. Small no. of molecules
- B. Large no. of molecule
- C. Average no. of molecule
- D. None of these
|
| 9 |
A Carnot engine has an efficiency of 50% when its sink temperature is at 27 <sup>o</sup>C. The temperature of source. |
- A. 273<sup> o</sup>C
- B. 300 <sup>o</sup>C
- C. 327 <sup>o</sup>C
- D. 373 <sup>o</sup>C
|
| 10 |
An ideal heat engine can only be 100% efficient if its cold temperature reservoir is at. |
- A. 0 K
- B. 0 <sup>o</sup>C
- C. 100 K
- D. 100 <sup>o</sup>C
|