MCQOPTIONS
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MCQOPTIONS
This section includes 31 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 tennis ball dropped from a height of 2 m rebounds only 1.5 m after hitting the ground. What fraction of its energy is lost in the impact |
| A. | \[\frac{1}{4}\] |
| B. | \[\frac{1}{2}\] |
| C. | \[HSO_{4}^{-}\] |
| D. | \[\frac{1}{8}\] |
| Answer» B. \[\frac{1}{2}\] | |
| 2. |
A neutron makes a head-on elastic collision with a stationary deuteron. The fractional energy loss of the neutron in the collision is [AIIMS 2003] |
| A. | 16/81 |
| B. | 44447 |
| C. | Potassium hydroxide |
| D. | 2/3 |
| Answer» C. Potassium hydroxide | |
| 3. |
The kinetic energy possessed by a body of mass m moving with a velocity v is equal to \[\frac{1}{2}m{{v}^{2}}\], provided |
| A. | The body moves with velocities comparable to that of light |
| B. | The body moves with velocities negligible compared to the speed of light |
| C. | Sommerfeld |
| D. | None of the above statement is correct |
| Answer» C. Sommerfeld | |
| 4. |
The diagrams represent the potential energy U of a function of the inter-atomic distance r. Which diagram corresponds to stable molecules found in nature. |
| A. | |
| B. | |
| Answer» B. | |
| 5. |
A sphere collides with another sphere of identical mass. After collision, the two spheres move. The collision is inelastic. Then the angle between the directions of the two spheres is [KCET 1994] |
| A. | \[90{}^\circ \] |
| B. | \[0{}^\circ \] |
| C. | 123Have\[O{{H}^{-}}>{{H}^{+}}\]Have \[O{{H}^{-}}={{H}^{+}}\]Have \[{{H}^{+}}>O{{H}^{-}}\] |
| D. | Different from\[90{}^\circ \] |
| Answer» E. | |
| 6. |
A body of mass M moves with velocity v and collides elastically with a another body of mass m (M>>m) at rest then the velocity of body of mass m is [BCECE 2004] |
| A. | v |
| B. | 2v |
| C. | Slaked lime |
| D. | Zero |
| Answer» C. Slaked lime | |
| 7. |
Two bodies having same mass 40 kg are moving in opposite directions, one with a velocity of 10\[m/s\] and the other with \[7m/s.\] If they collide and move as one body, the velocity of the combination is [Pb. PMT 2000] |
| A. | \[10\,m/s\] |
| B. | \[7m/s\] |
| C. | Sodium hydrogenchloride |
| D. | \[1.5\,m/s\] |
| Answer» E. | |
| 8. |
A body of mass \[{{m}_{1}}\] moving with a velocity 3 ms?1 collides with another body at rest of mass \[{{m}_{2}}.\]After collision the velocities of the two bodies are 2 ms?1 and 5ms?1 respectively along the direction of motion of \[{{m}_{1}}\] The ratio \[{{m}_{1}}/{{m}_{2}}\] is [EAMCET (Engg.) 2000] |
| A. | \[\frac{5}{12}\] |
| B. | \[5\] |
| C. | Sulphuric acid |
| D. | \[\frac{12}{5}\] |
| Answer» C. Sulphuric acid | |
| 9. |
A body falling from a height of 10m rebounds from hard floor. If it loses 20% energy in the impact, then coefficient of restitution is [AIIMS 2000] |
| A. | 0.89 |
| B. | 0.56 |
| C. | Common salt solution and baking soda |
| D. | 0.18 |
| Answer» B. 0.56 | |
| 10. |
If two balls each of mass 0.06 kg moving in opposite directions with speed 4 m/s collide and rebound with the same speed, then the impulse imparted to each ball due to other is [AFMC 1998,2001] |
| A. | 0.48 kg-m/s |
| B. | 0.24 kg-m/s |
| C. | strong base |
| D. | Zero |
| Answer» B. 0.24 kg-m/s | |
| 11. |
A body of mass m having an initial velocity v, makes head on collision with a stationary body of mass M. After the collision, the body of mass m comes to rest and only the body having mass M moves. This will happen only when [MP PMT 1995] |
| A. | \[m>>M\] |
| B. | \[m<<M\] |
| C. | Neutralization |
| D. | \[m=\frac{1}{2}M\] |
| Answer» D. \[m=\frac{1}{2}M\] | |
| 12. |
A body of mass 5 kg explodes at rest into three fragments with masses in the ratio 1 : 1 : 3. The fragments with equal masses fly in mutually perpendicular directions with speeds of 21 m/s. The velocity of the heaviest fragment will be [CBSE PMT 1991] |
| A. | 11.5 m/s |
| B. | 14.0 m/s |
| C. | A is true but R is false. |
| D. | 9.89 m/s |
| Answer» E. | |
| 13. |
If g is the acceleration due to gravity on the earth's surface, the gain in the potential energy of an object of mass m raised from the surface of earth to a height equal to the radius of the earth R, is [IIT 1983] |
| A. | \[\frac{1}{2}mgR\] |
| B. | 2 mgR |
| C. | Sodium hydroxide, acetic acid, \[{{H}_{2}}\] |
| D. | \[\frac{1}{4}mgR\] |
| Answer» B. 2 mgR | |
| 14. |
A uniform chain of length L and mass M is lying on a smooth table and one third of its length is hanging vertically down over the edge of the table. If g is acceleration due to gravity, the work required to pull the hanging part on to the table is [IIT 1985; MNR 1990; AIEEE 2002; MP PMT 1994, 97, 2000; JIPMER 2000] |
| A. | \[MgL\] |
| B. | \[MgL/3\] |
| C. | Sodium hydroxide reacts with hydrochloric acid to form sodium chloride. |
| D. | \[MgL/18\] |
| Answer» E. | |
| 15. |
The kinetic energy acquired by a mass m in travelling a certain distance d starting from rest under the action of a constant force is directly proportional to [CBSE PMT 1994] |
| A. | \[\sqrt{m}\] |
| B. | Independent of m |
| C. | Red |
| D. | m |
| Answer» C. Red | |
| 16. |
A spherical ball of mass 20 kg is stationary at the top of a hill of height 100 m. It slides down a smooth surface to the ground, then climbs up another hill of height 30 m and finally slides down to a horizontal base at a height of 20 m above the ground. The velocity attained by the ball is [AIEEE 2005] |
| A. | 10 m/s |
| B. | \[10\sqrt{30}\]m/s |
| C. | antacid |
| D. | 20 m/s |
| Answer» D. 20 m/s | |
| 17. |
A body is moving with a velocity v, breaks up into two equal parts. One of the part retraces back with velocity v. Then the velocity of the other part is [DCE 2004] |
| A. | v in forward direction |
| B. | 3v in forward direction |
| C. | Oxalic acid |
| D. | 3v in backward direction |
| Answer» C. Oxalic acid | |
| 18. |
A bullet moving with a speed of 100 \[m{{s}^{-1}}\]can just penetrate two planks of equal thickness. Then the number of such planks penetrated by the same bullet when the speed is doubled will be [KCET 2004] |
| A. | 4 |
| B. | 8 |
| C. | Neutral substances |
| D. | 10 |
| Answer» C. Neutral substances | |
| 19. |
Two identical blocks A and B, each of mass 'm' resting on smooth floor are connected by a light spring of natural length L and spring constant K, with the spring at its natural length. A third identical block 'C' (mass m) moving with a speed v along the line joining A and B collides with A. the maximum compression in the spring is [EAMCET 2003] |
| A. | \[v\sqrt{\frac{m}{2k}}\] |
| B. | \[m\sqrt{\frac{v}{2k}}\] |
| C. | (ii) and (iii) |
| D. | \[\frac{mv}{2k}\] |
| Answer» B. \[m\sqrt{\frac{v}{2k}}\] | |
| 20. |
If the momentum of a body is increased by 100%, then the percentage increase in the kinetic energy is [BHU 1999; Pb. PMT 1999; CPMT 2000; CBSE PMT 2001; BCECE 2004] |
| A. | 150% |
| B. | 200% |
| C. | A vitamin |
| D. | 300% |
| Answer» E. | |
| 21. |
If the increase in the kinetic energy of a body is 22%, then the increase in the momentum will be [RPET 1996; DPMT 2000] |
| A. | 22% |
| B. | 44% |
| C. | Sodium hydroxide |
| D. | 300% |
| Answer» D. 300% | |
| 22. |
An object of 1 kg mass has a momentum of 10 kg m/sec then the kinetic energy of the object will be [RPMT 1999] |
| A. | 100 J |
| B. | 50 J |
| C. | Sodium hydroxide |
| D. | 200 J |
| Answer» C. Sodium hydroxide | |
| 23. |
A bomb of 12 kg divides in two parts whose ratio of masses is 1 : 3. If kinetic energy of smaller part is 216 J, then momentum of bigger part in kg-m/sec will be [RPET 1997] |
| A. | 36 |
| B. | 72 |
| C. | \[HCl\] |
| D. | Data is incomplete |
| Answer» B. 72 | |
| 24. |
Two bodies with kinetic energies in the ratio of 4 : 1 are moving with equal linear momentum. The ratio of their masses is [CBSE PMT 1999] |
| A. | 1 : 2 |
| B. | 1 : 1 |
| C. | a salt. |
| D. | 1 : 4 |
| Answer» E. | |
| 25. |
If velocity of a body is twice of previous velocity, then kinetic energy will become [AFMC 1996] |
| A. | 2 times |
| B. | \[\frac{1}{2}\]times |
| C. | \[HN{{O}_{3}}\] |
| D. | 1 times |
| Answer» D. 1 times | |
| 26. |
If the K.E. of a particle is doubled, then its momentum will [EAMCET 1979; CPMT 2003: Kerala PMT 2005] |
| A. | Remain unchanged |
| B. | Be doubled |
| C. | |
| D. | Increase \[\sqrt{2}\] times |
| Answer» E. | |
| 27. |
The energy stored in wound watch spring is [EAMCET 1982] |
| A. | K.E. |
| B. | P.E. |
| C. | |
| D. | Chemical energy |
| Answer» C. | |
| 28. |
Two masses of 1 gm and 4 gm are moving with equal kinetic energies. The ratio of the magnitudes of their linear momenta is [AIIMS 1987; NCERT 1983; MP PMT 1993; IIT 1980; RPET 1996; CBSE PMT 1997; Orissa JEE 2003; KCET 1999; DCE 2004] |
| A. | 4 : 1 |
| B. | \[\sqrt{2}:1\] |
| C. | \[45{}^\circ \] |
| D. | 1 : 16 |
| Answer» D. 1 : 16 | |
| 29. |
Assertion : The instantaneous power of an agent is measured as the dot product of instantaneous velocity and the force acting on it at that instant. Reason : The unit of instantaneous power is watt. |
| A. | If both assertion and reason are true and the reason is the correct explanation of the assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of the assertion. |
| C. | \[\frac{1}{3}\] |
| D. | If the assertion and reason both are false. |
| E. | If assertion is false but reason is true. |
| Answer» C. \[\frac{1}{3}\] | |
| 30. |
Assertion : Work done by or against gravitational force in moving a body from one point to another is independent of the actual path followed between the two points. Reason : Gravitational forces are conservative forces. |
| A. | If both assertion and reason are true and the reason is the correct explanation of the assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of the assertion. |
| C. | v/2 |
| D. | If the assertion and reason both are false. |
| E. | If assertion is false but reason is true. |
| Answer» B. If both assertion and reason are true but reason is not the correct explanation of the assertion. | |
| 31. |
Assertion : The power of a pump which raises 100 kg of water in 10sec to a height of 100 m is 10 KW. Reason : The practical unit of power is horse power. |
| A. | If both assertion and reason are true and the reason is the correct explanation of the assertion. |
| B. | If both assertion and reason are true but reason is not the correct explanation of the assertion. |
| C. | 46600 |
| D. | If the assertion and reason both are false. |
| E. | If assertion is false but reason is true. |
| Answer» C. 46600 | |