MCQOPTIONS
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MCQOPTIONS
This section includes 36 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
According to Pascals law the pressure of gas in a vessel is |
| A. | Different in different direction |
| B. | Same in all direction |
| C. | Same only along opposite directions |
| D. | Same only along normal directions |
| Answer» C. Same only along opposite directions | |
| 2. |
At constant temperature the graph between V and 1/P is |
| A. | Hyperbola |
| B. | Parabola |
| C. | A curve of any shape |
| D. | A straight lime |
| Answer» E. | |
| 3. |
Adiabatic process is also called |
| A. | Heat exchange process |
| B. | Heating process |
| C. | Isentropic process |
| D. | All of the above |
| Answer» D. All of the above | |
| 4. |
Average translational kinetic energy per molecule of an ideal gas is given by |
| A. | 3NaT/2R |
| B. | 2NaT/3 |
| C. | 3RT/2Na |
| D. | 3Na/2RT |
| Answer» D. 3Na/2RT | |
| 5. |
Boltzman constant K in terms of universal gas constant R and Avagadros number Na is give as |
| A. | K = RNa |
| B. | K = R/Na |
| C. | K = Na/Ra |
| D. | K = nRNa |
| Answer» C. K = Na/Ra | |
| 6. |
Boyles law helds for ideal gases in |
| A. | Isochoric processes |
| B. | Isobaric processes |
| C. | Isothermal processes |
| D. | Adiabatic processes |
| Answer» D. Adiabatic processes | |
| 7. |
Metabolism is the name of a process in which energy transformation takes place within |
| A. | Heat engine |
| B. | Human body |
| C. | Atmosphere |
| D. | Laboratory |
| Answer» C. Atmosphere | |
| 8. |
Normal human body temperature 98.6?F corresponds to |
| A. | 37?C |
| B. | 42?C |
| C. | 55?C |
| D. | 410?C |
| Answer» B. 42?C | |
| 9. |
Numerical value of Boltzmanns constant is |
| A. | 1.38x10-31JK-1 |
| B. | 3.18x10-31JK-1 |
| C. | 3.18x10-23JK-1 |
| D. | 1.38x10-23JK-1 |
| Answer» E. | |
| 10. |
Petrol engine is a |
| A. | C.I engine |
| B. | SI engine |
| C. | IC engine |
| D. | All the above |
| Answer» E. | |
| 11. |
Standard condition STP refer to a gas at |
| A. | 76cm 0?C |
| B. | 760mm 273K |
| C. | 1atm 273K |
| D. | All of the above |
| Answer» E. | |
| 12. |
Temperature is a property which determines |
| A. | How much heat a body contains |
| B. | Whether a body will feel hot or cold to touch |
| C. | In which direction heat will flow between two systems |
| D. | How much total absolute energy a body has |
| Answer» D. How much total absolute energy a body has | |
| 13. |
The area enclosed by the curve ABCDA for a Carnot heat engine represents the work done by Carnot engine |
| A. | At any instant |
| B. | Averagely |
| C. | During its operation |
| D. | During one cycle |
| Answer» E. | |
| 14. |
The Fahrenheit and centigrade scales agree to |
| A. | 40 |
| B. | 15.5 |
| C. | 542 |
| D. | 273 |
| Answer» B. 15.5 | |
| 15. |
The performance of a refrigerator is described by |
| A. | Efficiency |
| B. | Coefficient of performance |
| C. | Both (a) and (b) |
| D. | Not described |
| Answer» C. Both (a) and (b) | |
| 16. |
The pressure exerted by a column of mercury 76cm high and at 0?C is called |
| A. | 1 atmosphere |
| B. | 1 Newton per square meter |
| C. | 1 Pascal |
| D. | Data is insufficient |
| Answer» B. 1 Newton per square meter | |
| 17. |
The purpose of flywheel in the engines is |
| A. | To smooth out the energy variation |
| B. | To add more weight to engine to work it stable |
| C. | To start engine |
| D. | Both (a) and (b) |
| Answer» B. To add more weight to engine to work it stable | |
| 18. |
The reading on the Fahrenheit scale will be double the reading on the centigrade scale when the temperature on the centigrade scale is |
| A. | 460?C |
| B. | 280?C |
| C. | 360?C |
| D. | 160?C |
| Answer» D. 160?C | |
| 19. |
The scales of temperature are based on two fixed points which are |
| A. | The temperatures of water at 0? 100?C |
| B. | The temperature of melting ice and boiling water at atmospheric pressure |
| C. | The temperatures of ice cold and boiling water |
| D. | The temperatures of frozen and boiling mercury |
| Answer» C. The temperatures of ice cold and boiling water | |
| 20. |
The size of one degree of Celsius is equal to |
| A. | One degree of Fahrenheit scale |
| B. | 1.8 degrees of Fahrenheit scale |
| C. | 3.2 degrees of Fahrenheit scale |
| D. | 2.12 degrees of Fahrenheit scale |
| Answer» C. 3.2 degrees of Fahrenheit scale | |
| 21. |
The unit of entropy is |
| A. | J.K |
| B. | J/K |
| C. | N.m/sec |
| D. | Kgm2/sec2.K |
| Answer» C. N.m/sec | |
| 22. |
Dimension of pressure is |
| A. | MLT |
| B. | ML-1T-1 |
| C. | ML-1T-2 |
| D. | ML-2T-2 |
| Answer» D. ML-2T-2 | |
| 23. |
For a gas obeying Boyles law if the pressure is doubled the volume becomes |
| A. | Double |
| B. | One half |
| C. | Four times |
| D. | One fourth |
| Answer» C. Four times | |
| 24. |
For the successful operation of Heat engine which condition should be met. |
| A. | Cyclic process |
| B. | Operated at certain temperature difference |
| C. | Both (a) and (b) |
| D. | None of these |
| Answer» D. None of these | |
| 25. |
Gas molecules of different masses in the same container have the same average transnational kinetic energy which is directly proportional to their |
| A. | Volume |
| B. | Pressure |
| C. | Absolute temperature |
| D. | Time |
| Answer» D. Time | |
| 26. |
If the pressure of a given gas is held constant its density is inversely proportional to its absolute temperature. We can refer it as another statement of |
| A. | Boyles law |
| B. | Charles law |
| C. | Ideal gas law |
| D. | Avagadros law |
| Answer» C. Ideal gas law | |
| 27. |
If the volume of a gas is held constant and we increase its temperature then |
| A. | Its pressure is constant |
| B. | Its pressure rises |
| C. | Its pressure falls |
| D. | Any of above |
| Answer» C. Its pressure falls | |
| 28. |
In a clinical thermometer the mercury in the capillary tube does not contract once removed from the patient because |
| A. | Mercury takes a long time to contract |
| B. | The amount of mercury use is very small |
| C. | The capillary tube has a small constriction near the bulb |
| D. | The capillary tube is very narrow |
| Answer» D. The capillary tube is very narrow | |
| 29. |
In which process all the heat supplied is converted into work done. |
| A. | Isothermal |
| B. | Isochoric |
| C. | Isobaric |
| D. | Isentropic |
| Answer» B. Isochoric | |
| 30. |
In which process entropy remains constant |
| A. | Isobaric |
| B. | Isochoric |
| C. | Adiabatic |
| D. | Isothermal |
| Answer» D. Isothermal | |
| 31. |
The work done in the isochoric process is |
| A. | Constant |
| B. | Variable |
| C. | Zero |
| D. | Depends on situation |
| Answer» D. Depends on situation | |
| 32. |
The value of ? for diatomic gas is |
| A. | 1.67 |
| B. | 1.4 |
| C. | ? = 1.3 |
| D. | None |
| Answer» C. ? = 1.3 | |
| 33. |
We can produce heat by |
| A. | Frictional process |
| B. | Chemical processes |
| C. | Electrical processes |
| D. | All of the above |
| Answer» E. | |
| 34. |
We prefer mercury as a thermometric substance because |
| A. | Over a wide range of temperature its expansion is uniform |
| B. | It does not stick to thermometer glass |
| C. | It opaque to light |
| D. | All of above |
| Answer» E. | |
| 35. |
Which of the following properties of molecules of a gas is same for all gases at particular temperature? |
| A. | Momentum |
| B. | Mass |
| C. | Velocity |
| D. | Kinetic energy |
| Answer» E. | |
| 36. |
Which quantity is a state function |
| A. | Internal energy |
| B. | Heat supply |
| C. | Pressure |
| D. | Volume |
| Answer» B. Heat supply | |