KVPY Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics: Questions 70 - 73 of 268
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: 70
» Thermodynamics » Work in Thermodynamic Process and PV Diagrams
Appeared in Year: 2011
Question
A constant amount of an ideal gas undergoes the cyclic process ABCA in the PV diagram shown below
Shows PV Diagram of Cycle
In figure PV diagram of a cycle ABC is shown.
The path BC is an isothermal. The work done by the gas during one complete cycle, beginning and ending at A, is nearly –
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | -600 kJ |
|
| b. | -300 kJ |
|
| c. | 600 kJ |
|
| d. | 300 kJ |
|
Question number: 71
» Wave Optics » Malus' Law and Its Application
Appeared in Year: 2012
Question
An unpolarized beam of light of intensity Ι0 passes through two linear polarizers making an angle of 300 with respect to each other. The emergent beam will have intensity.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. |
|
|
| b. |
|
|
| c. |
|
|
| d. |
|
|
Question number: 72
» Experimental Skills » Speed of Sound in Air
Appeared in Year: 2012
Question
The ratio of the speed of sound to the average speed of an air molecule at 300K and 1 atmospheric pressure is close to,
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 400 |
|
| b. |
|
|
| c. | 1 |
|
| d. |
|
|
Question number: 73
» Thermodynamics » Work in Thermodynamic Process and PV Diagrams
Appeared in Year: 2012
Question
An ideal monatomic gas expands to twice its volume. If the process is isothermal, the magnitude of work done by the gas is Wi. If the process is adiabatic the magnitude of work done by the gas is Wa. Which of the following is true,
Choices
| Choice (4) | Response | |
|---|---|---|
| a. |
|
|
| b. |
|
|
| c. |
|
|
| d. |
|
|