MCQOPTIONS
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MCQOPTIONS
This section includes 40 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A man lifts vertically a weight of 40kg through 1m in 10s; while a chile lifts vertically a weight of 10kg through a distance of 1m in 1s. What will be correct inference? |
| A. | Man does more work than child |
| B. | Child does more work than man |
| C. | Both do the same amount of work |
| D. | It is a foolish question |
| Answer» C. Both do the same amount of work | |
| 2. |
A field in which the work done in a moving a body along closed path is zero is called |
| A. | Electric field |
| B. | Conservative field |
| C. | Electromagnetic field |
| D. | Gravitational field |
| Answer» C. Electromagnetic field | |
| 3. |
An elevator weighing 3.5 x 10-6 N is raised to a height of 1000 m in the absence of friction, the work done is |
| A. | 3.5 x 103 J |
| B. | 3.5 x 104 J |
| C. | 3.5 x 106 J |
| D. | 3.5 x 109 J |
| Answer» E. | |
| 4. |
Gravitational P.E of a body has |
| A. | No formula |
| B. | A formula mgh only |
| C. | A formula |
| D. | No general formula |
| Answer» E. | |
| 5. |
Geothermal energy is a ____________________ source of energy. |
| A. | Non-renewable |
| B. | Stable |
| C. | Renewable |
| D. | None of the above |
| Answer» D. None of the above | |
| 6. |
Biomass can be converted into fuels by |
| A. | Direct combustion |
| B. | Fermentation |
| C. | Both (a) and (b) |
| D. | None of these |
| Answer» D. None of these | |
| 7. |
The average power and instantaneous power become equal if work is done at |
| A. | Any rate |
| B. | At variable rate |
| C. | At uniform rate |
| D. | At high rate |
| Answer» D. At high rate | |
| 8. |
The consumption of energy by a 60 watt bulb in 2 sec is |
| A. | 120 J |
| B. | 60 J |
| C. | 30 J |
| D. | 0.02 J |
| Answer» B. 60 J | |
| 9. |
The dimension of power is |
| A. | [ML2T-3] |
| B. | [ML2T-2] |
| C. | [ML2T3] |
| D. | None of these |
| Answer» B. [ML2T-2] | |
| 10. |
The dot product of force and velocity is |
| A. | Power |
| B. | Work |
| C. | Impulse |
| D. | Torque |
| Answer» B. Work | |
| 11. |
The escape velocity form the earth surface in km S-1 is |
| A. | 4.2 km S-1 |
| B. | 7.5 km S-1 |
| C. | 9.5 km S-1 |
| D. | 1.1 km S-1 |
| Answer» E. | |
| 12. |
The escape velocity of a body in gravitational field of earth is independent of |
| A. | Its mass |
| B. | The angle at which it is thrown |
| C. | Both its mass and the angle at which it is thrown |
| D. | Gravitational field of earth |
| Answer» D. Gravitational field of earth | |
| 13. |
The highest value of escape velocity in solar system is planet |
| A. | Earth |
| B. | Neptune |
| C. | Jupiter |
| D. | Moon |
| Answer» D. Moon | |
| 14. |
The relation between horse power and watt is |
| A. | 1 hp = 546 watts |
| B. | 1 hp = 746 watts |
| C. | 1 hp = 1000 watts |
| D. | 1 hp = 946 watts |
| Answer» C. 1 hp = 1000 watts | |
| 15. |
The relation between the escape velocity V esc and orbital speed Vo is given by |
| A. | V esc = 1/2Vo |
| B. | V esc = ?2 Vo |
| C. | V esc = Vo |
| D. | V esc = 2Vo |
| Answer» C. V esc = Vo | |
| 16. |
The source of geothermal energy is |
| A. | Decay of radioactive element in the earth |
| B. | Compression of material in the earth |
| C. | Residual lost of the earth |
| D. | All as said in a - b and c |
| Answer» E. | |
| 17. |
The source of tidal energy is |
| A. | Sun |
| B. | Earth |
| C. | Both (a) and (b) |
| D. | Moon |
| Answer» E. | |
| 18. |
The tides raise the mater in the see roughly in a day |
| A. | Once |
| B. | Twice |
| C. | Four time |
| D. | Eight time |
| Answer» C. Four time | |
| 19. |
The work done by friction is |
| A. | Positive |
| B. | Negative |
| C. | Zero |
| D. | None of these |
| Answer» C. Zero | |
| 20. |
When a force is parallel to the direction of motion of the body, then work done on the body is |
| A. | Zero |
| B. | Minimum |
| C. | Infinity |
| D. | Maximum |
| Answer» E. | |
| 21. |
When arrow is released form its bow, its energy is transformed from |
| A. | Heat energy to K.E |
| B. | Elastic P.E to K.E |
| C. | Elemical energy to elastic P.E |
| D. | K.E to elastic P.E. |
| Answer» C. Elemical energy to elastic P.E | |
| 22. |
If a body a mass of 2 kg is raised vertically through 2m, then the work done will be |
| A. | 38.2 J |
| B. | 392.1 J |
| C. | 39.2 J |
| D. | 3.92 J |
| Answer» D. 3.92 J | |
| 23. |
If moon radius is 1600 km and g on its surface is 1.6 ms-2 then the escape velocity on the moon is |
| A. | 1600 ms-1 |
| B. | 50.6 ms-1 |
| C. | 71.6 ms-1 |
| D. | 2263ms-1 |
| Answer» C. 71.6 ms-1 | |
| 24. |
If velocity is doubled then |
| A. | Momentum increases 4 times and K.E increases 2 times |
| B. | Momentum and K.E. remain same |
| C. | Momentum increases 2 times and K.E increases constant |
| D. | Momentum increases 2 times and K.E increases 4 time |
| Answer» E. | |
| 25. |
On a clear day at noon the solar energy reaching the earth is |
| A. | 1.44kw/m2 |
| B. | 1.4kw/m2 |
| C. | 1 kw/m2 |
| D. | None |
| Answer» D. None | |
| 26. |
One mega watt hour is equal to |
| A. | 36 x 106 J |
| B. | 36 x 1012 J |
| C. | 36 x 109 J |
| D. | 36 x 108 J |
| Answer» E. | |
| 27. |
Propulsion force of a rocket is |
| A. | Non-conservative force |
| B. | Conservative force |
| C. | Both (a) and (b) |
| D. | Non of these |
| Answer» B. Conservative force | |
| 28. |
Proton electron neutron and a particles have same momentum. Which of them have highest K.E? |
| A. | Proton |
| B. | Electron |
| C. | Neutron |
| D. | A-particle |
| Answer» C. Neutron | |
| 29. |
Slope of work time graph is equal to |
| A. | Displacement |
| B. | Acceleration |
| C. | Power |
| D. | Energy |
| Answer» D. Energy | |
| 30. |
The area under the force displacement graph represents |
| A. | Area |
| B. | Work done |
| C. | Power |
| D. | None of these |
| Answer» C. Power | |
| 31. |
When the speed of a moving body is doubled then |
| A. | Its K.E is doubled |
| B. | Its acceleration is doubled |
| C. | Its P.E is doubled |
| D. | Its momentum is doubled |
| Answer» E. | |
| 32. |
When two protons are brought together |
| A. | Kinetic energy increases |
| B. | P.E. between them increases |
| C. | P.E. between them decreases |
| D. | P.E. between tem does not change |
| Answer» C. P.E. between them decreases | |
| 33. |
Which of the following is not conservative force |
| A. | Friction |
| B. | Electric |
| C. | Gravitational |
| D. | Magnetic |
| Answer» B. Electric | |
| 34. |
Which of the following types of force can do no work on the particle on which it acts? |
| A. | Frictional force |
| B. | Gravitational force |
| C. | Elastic force |
| D. | Centripetal force |
| Answer» E. | |
| 35. |
Work done by the force of friction is |
| A. | Always positive |
| B. | Always negative |
| C. | Positive only for small frictional force |
| D. | Positive only for large frictional force |
| Answer» C. Positive only for small frictional force | |
| 36. |
Work done by variable force is determine by dividing |
| A. | Force into small interval |
| B. | Displacement into small interval |
| C. | Both force and displacement into small intervals |
| D. | Force into small and displacement into large intervals |
| Answer» C. Both force and displacement into small intervals | |
| 37. |
Work done on the body equals to the |
| A. | Change in its K.E always |
| B. | Change in its P.E always |
| C. | Change in its K.E and change in its P.E |
| D. | Neither change in K.E and nor change in its P.E |
| Answer» D. Neither change in K.E and nor change in its P.E | |
| 38. |
Work done will be maximum if the angle between the force F and displacement d is |
| A. | 45? |
| B. | 90? |
| C. | 180? |
| D. | 0? |
| Answer» E. | |
| 39. |
Work has the dimension as that of same as that of |
| A. | Torque |
| B. | Angular momentum |
| C. | Linear momentum |
| D. | Power |
| Answer» B. Angular momentum | |
| 40. |
________________ cells converts solar energy into electrical energy |
| A. | Rotory |
| B. | Photovoltaic |
| C. | Galvanic |
| D. | Non of these |
| Answer» C. Galvanic | |