MCQOPTIONS
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MCQOPTIONS
This section includes 44 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In anaerobic respiration, the final electron acceptor can be |
| A. | oxygen |
| B. | nitrate |
| C. | pyruvate |
| D. | acetyl-CoA |
| Answer» C. pyruvate | |
| 2. |
When a body moves with a constant speed along a circle ___________ |
| A. | No work is done on it |
| B. | No acceleration is produced in it |
| C. | Its velocity remains constant |
| D. | No force acts on it |
| Answer» B. No acceleration is produced in it | |
| 3. |
Assertion: In and elastic collision of two billiard balls, the total kinetic energy is conserved during the short time of collision of balls.Reason: Energy spent against friction does not follow the law of conservation of energy |
| A. | Both assertion and reason are true and the reason is the correct explanation of the assertion |
| B. | Both assertion and reason are true but the reason is not the correct explanation of the assertion |
| C. | Both assertion and reason are false |
| D. | Assertion is true but the reason is false |
| Answer» D. Assertion is true but the reason is false | |
| 4. |
In elastic collision, 100% energy transfer takes place when ___________ |
| A. | m1=2m2 |
| B. | m1 is greater than m2 |
| C. | m1 is lesser than m2 |
| D. | m1=m2 |
| Answer» E. | |
| 5. |
Two particles are seen to collide and move jointly together after the collision. During such a collision, for the total system ___________ |
| A. | Neither the mechanical energy nor the linear momentum is conserved |
| B. | Mechanical energy is conserved, but not the linear momentum |
| C. | Both the mechanical energy and the linear momentum are conserved |
| D. | Linear momentum is conserved, but not the mechanical energy |
| Answer» E. | |
| 6. |
If the water falls from a dam into a turbine wheel 19.6m below, then the velocity of water at the turbine is? (g=9.8m/s) |
| A. | 9.8m/s |
| B. | 19.6m/s |
| C. | 39.2m/s |
| D. | 98m/s |
| Answer» C. 39.2m/s | |
| 7. |
The decrease in potential energy of a ball of mass 20kg, which falls from a height of 50cm, is? |
| A. | 968J |
| B. | 98J |
| C. | 1980J |
| D. | 450J |
| Answer» C. 1980J | |
| 8. |
The kinetic energy of a body becomes four times of its initial value, then new momentum will ___________ |
| A. | Become twice its initial value |
| B. | Become thrice its initial value |
| C. | Become four times its initial value |
| D. | Remains constant |
| Answer» B. Become thrice its initial value | |
| 9. |
Kinetic energy with any reference must be ___________ |
| A. | Zero |
| B. | Positive |
| C. | Negative |
| D. | Either negative or positive |
| Answer» C. Negative | |
| 10. |
A boy carrying a box on his head is walking on a level load from one place to another on a straight road is doing no work. The statement is? |
| A. | Correct |
| B. | Incorrect |
| C. | Partly correct |
| D. | Insufficient data |
| Answer» B. Incorrect | |
| 11. |
The limitation of the first law is |
| A. | does not indicate the possibility of a spontaneous process proceeding in a definite direction |
| B. | it assigns a quality to different forms of energy |
| C. | indicates the direction of any spontaneous process |
| D. | none of the mentioned |
| Answer» B. it assigns a quality to different forms of energy | |
| 12. |
A perpetual motion machine of first kind |
| A. | is a fictitious machine |
| B. | can supply mechanical work without dissipating energy |
| C. | violates first law |
| D. | all of the mentioned |
| Answer» E. | |
| 13. |
Energy is a |
| A. | point function |
| B. | property of the system |
| C. | extensive property |
| D. | all of the mentioned |
| Answer» E. | |
| 14. |
Practically, if 10kJ of energy is supplied to a device, how much energy will the device give back? |
| A. | Equal to10kJ |
| B. | Less than 10kJ |
| C. | More than 10kJ |
| D. | Zero |
| Answer» C. More than 10kJ | |
| 15. |
Calculate the energy in the 5 ohm resistor in 20 seconds. |
| A. | 21.5kJ |
| B. | 2.15kJ |
| C. | 2.15J |
| D. | 21.5kJ |
| Answer» B. 2.15kJ | |
| 16. |
A current of 2A flows in a wire offering a resistance of 10ohm. Calculate the energy dissipated by the wire in 0.5 hours. |
| A. | 72Wh |
| B. | 72kJ |
| C. | 7200J |
| D. | 72kJh |
| Answer» C. 7200J | |
| 17. |
Calculate the energy in the 10 ohm resistance in 10 seconds. |
| A. | 400J |
| B. | 40kJ |
| C. | 4000J |
| D. | 4kJ |
| Answer» C. 4000J | |
| 18. |
Calculate the energy dissipated by the circuit in 50 seconds. |
| A. | 50kJ |
| B. | 50J |
| C. | 100j |
| D. | 100kJ |
| Answer» B. 50J | |
| 19. |
Which among the following is a unit for electrical energy? |
| A. | V(volt)b) kWh(kilowatt-hour)c) Ohmd) C(coloum |
| B. | kWh(kilowatt-hour) |
| C. | Ohm |
| D. | C(coloumb) |
| Answer» C. Ohm | |
| 20. |
A_PERPETUAL_MOTION_MACHINE_OF_FIRST_KIND?$ |
| A. | is a fictitious machine |
| B. | can supply mechanical work without dissipating energy |
| C. | violates first law |
| D. | all of the mentioned |
| Answer» E. | |
| 21. |
ASSERTION:_IN_AND_ELASTIC_COLLISION_OF_TWO_BILLIARD_BALLS,_THE_TOTAL_KINETIC_ENERGY_IS_CONSERVED_DURING_THE_SHORT_TIME_OF_COLLISION_OF_BALLS?$ |
| A. | |
| B. | Both assertion and reason are true and the reason is the correct explanation of the assertion |
| C. | Both assertion and reason are true but the reason is not the correct explanation of the assertion |
| Answer» D. | |
| 22. |
Practically,_if_10kJ_of_energy_is_supplied_to_a_device,_how_much_energy_will_the_device_give_back?$ |
| A. | Equal to10kJ |
| B. | Less than 10kJ |
| C. | More than 10kJ |
| D. | Zero |
| Answer» C. More than 10kJ | |
| 23. |
The_limitation_of_the_first_law_is$ |
| A. | does not indicate the possibility of a spontaneous process proceeding in a definite direction |
| B. | it assigns a quality to different forms of energy |
| C. | indicates the direction of any spontaneous process |
| D. | none of the mentioned |
| Answer» B. it assigns a quality to different forms of energy | |
| 24. |
When_a_body_moves_with_a_constant_speed_along_a_circle$ |
| A. | No work is done on it |
| B. | No acceleration is produced in it |
| C. | Its velocity remains constant |
| D. | No force acts on it |
| Answer» B. No acceleration is produced in it | |
| 25. |
A current of 2A flows in a wire offering a resistance of 10ohm. Calculate the energy dissipated by the wire in 0.5 hours? |
| A. | 72Wh |
| B. | 72kJ |
| C. | 7200J |
| D. | 72kJh |
| Answer» B. 72kJ | |
| 26. |
Which of the following is true in regard to the energy of an isolated system? |
| A. | dQ≠0 |
| B. | dW≠0 |
| C. | E=constant |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| 27. |
In elastic collision, 100% energy transfer takes place whe? |
| A. | m<sub>1</sub>=2m<sub>2</sub> |
| B. | m<sub>1</sub> is greater than m<sub>2</sub> |
| C. | m<sub>1</sub> is lesser than m<sub>2</sub> |
| D. | m<sub>1</sub>=m<sub>2</sub> |
| Answer» E. | |
| 28. |
A battery converts___________ |
| A. | Electrical energy to chemical energy |
| B. | Chemical energy to electrical energy |
| C. | Mechanical energy to electrical energy |
| D. | Chemical energy to mechanical energy |
| Answer» C. Mechanical energy to electrical energy | |
| 29. |
In an ideal gas there are no intermolecular forces of attraction and repulsion, and the internal energy is a function of temperature only. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 30. |
Two particles are seen to collide and move jointly together after the collision. During such a collision, for the total system, |
| A. | Neither the mechanical energy nor the linear momentum is conserved |
| B. | Mechanical energy is conserved, but not the linear momentum |
| C. | Both the mechanical energy and the linear momentum are conserved |
| D. | Linear momentum is conserved, but not the mechanical energy |
| Answer» E. | |
| 31. |
The total internal energy of the system is given by |
| A. | U=N/…õ |
| B. | U=N…õ |
| C. | U=…õ/N |
| D. | none of the mentioned |
| Answer» C. U=‚Äö√Ѭ∂‚àö¬µ/N | |
| 32. |
Momentum is conserved in all collisions but not kinetic energy. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 33. |
Which among the following is an expression for energy? |
| A. | V<sup>2</sup>It |
| B. | V<sup>2</sup>Rt |
| C. | V<sup>2</sup>t/R |
| D. | V<sup>2</sup>t<sup>2</sup>/R |
| Answer» D. V<sup>2</sup>t<sup>2</sup>/R | |
| 34. |
Which of the following types of energy can be present in molecules? |
| A. | translational and rotational kinetic energy |
| B. | electronic energy and vibrational energy |
| C. | chemical energy and nuclear energy |
| D. | all of the mentioned |
| Answer» E. | |
| 35. |
If the water falls from a dam into a turbine wheel 19.6m below, then the velocity of water at the turbine is (g=9.8m/s) |
| A. | 9.8m/s |
| B. | 19.6m/s |
| C. | 39.2m/s |
| D. | 98m/s |
| Answer» C. 39.2m/s | |
| 36. |
(m*g*z) gives the |
| A. | macroscopic kinetic energy |
| B. | microscopic kinetic energy |
| C. | macroscopic potential energy |
| D. | microscopic potential energy |
| Answer» D. microscopic potential energy | |
| 37. |
The decrease in potential energy of a ball of mass 20kg, which falls from a height of 50cm, is |
| A. | 968J |
| B. | 98J |
| C. | 1980J |
| D. | 450J |
| Answer» C. 1980J | |
| 38. |
Out of the following, which one is not a source of electrical energy? |
| A. | Solar cell |
| B. | Battery |
| C. | Potentiometer |
| D. | Generator |
| Answer» D. Generator | |
| 39. |
(m*V*V)/2 gives the |
| A. | macroscopic kinetic energy |
| B. | microscopic kinetic energy |
| C. | macroscopic potential energy |
| D. | microscopic potential energy |
| Answer» B. microscopic kinetic energy | |
| 40. |
The kinetic energy of a body becomes four times of its initial value, then new momentum will |
| A. | Become twice its initial value |
| B. | Become thrice its initial value |
| C. | Become four times its initial value |
| D. | Remains constant |
| Answer» B. Become thrice its initial value | |
| 41. |
A bulb has a power of 200W. What is the energy dissipated by it in 5 minutes? |
| A. | 60J |
| B. | 1000J |
| C. | 60kJ |
| D. | 1kJ |
| Answer» D. 1kJ | |
| 42. |
The specific energy, e=E/m is an extensive property. |
| A. | true |
| B. | false |
| Answer» C. | |
| 43. |
Kinetic energy with any reference must be |
| A. | Zero |
| B. | Positive |
| C. | Negative |
| D. | Either negative or positive |
| Answer» C. Negative | |
| 44. |
A boy carrying a box on his head is walking on a level load from one place to another on a straight road is doing no work. The statement is |
| A. | Correct |
| B. | Incorrect |
| C. | Partly correct |
| D. | Insufficient data |
| Answer» B. Incorrect | |