MCQOPTIONS
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MCQOPTIONS
This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The second law of thermodynamics states that? |
| A. | Entropy of an isolated system can never decrease over time |
| B. | Entropy of a pure crystalline substance at 0K is 0 |
| C. | Energy is conserved |
| D. | Entropy of a system can never decrease |
| Answer» B. Entropy of a pure crystalline substance at 0K is 0 | |
| 2. |
Which of the following is the Kelvin Planck statement? |
| A. | Heat from a cold reservoir cannot be transferred to a hot reservoir without external work |
| B. | Efficiency for a reversible cyclic process can be 1 |
| C. | Heat from a hot reservoir can be completely converted into work if process is reversible |
| D. | Efficiency of a heat engine is less than 1 |
| Answer» E. | |
| 3. |
Which law of thermodynamics says that efficiency of a heat engine cannot be 1? |
| A. | First |
| B. | Zeroth |
| C. | Second |
| D. | Third |
| Answer» D. Third | |
| 4. |
According to the first law of thermodynamics, a book lying on a table can fly upwards on its own by using the internal energy of the table. True or False? |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
A process is carried out between 2 systems. It is possible for entropy of one system to decrease. True or False? |
| A. | True |
| B. | False |
| Answer» B. False | |