MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 4 Mcqs, each offering curated multiple-choice questions to sharpen your Physics Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
At constant pressure P the volume of a gas increases from V1 to V2 when ‘Q’ amount of heat is removed from the system. What will happen to internal energy? |
| A. | Remain the same if Q = P(V1 – V2) |
| B. | Decrease by an amount P(V2 – V1) – Q |
| C. | Decrease by an amount Q + P(V2 – V1) |
| D. | Increase by some unknown amount |
| Answer» D. Increase by some unknown amount | |
| 2. |
A disc spinning with 24J of kinetic energy is kept in a container containing a fluid having a heat capacity of 2000J/K. When the disc comes to rest what will be the change in internal energy if ΔU = 3.5ΔT. |
| A. | 0 |
| B. | 0.042J |
| C. | 0.021J |
| D. | 0.028J |
| Answer» C. 0.021J | |
| 3. |
Consider a gas contained in a rigid container of volume 20m3. What will be the change in internal energy if 50J of heat is provided to it? Assume the gas exerts a pressure of 1atm on the walls. |
| A. | 50J |
| B. | 0 |
| C. | 70J |
| D. | 20J |
| Answer» B. 0 | |
| 4. |
ΔU=0 means that the process is isothermic. True or False? |
| A. | True |
| B. | False |
| Answer» B. False | |