MCQOPTIONS
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MCQOPTIONS
This section includes 383 Mcqs, each offering curated multiple-choice questions to sharpen your NEET knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which is different from others by units [Orissa JEE 2002] |
| A. | (a) Phase difference |
| B. | Mechanical equivalent |
| C. | Loudness of sound |
| D. | Poisson's ratio |
| Answer» E. | |
| 2. |
Temperature can be expressed as a derived quantity in terms of any of the following [MP PET 1993; UPSEAT 2001] |
| A. | Length and mass |
| B. | Mass and time |
| C. | Length, mass and time |
| D. | None of these |
| Answer» E. | |
| 3. |
Dyne/cm2 is not a unit of [RPET 2000] |
| A. | Pressure |
| B. | Stress |
| C. | Strain |
| D. | Young's modulus |
| Answer» D. Young's modulus | |
| 4. |
In which of the following systems of unit, \[Weber\] is the unit of magnetic flux [SCRA 1991; CBSE PMT 1993; DPMT 2005] |
| A. | CGS |
| B. | MKS |
| C. | SI |
| D. | None of these |
| Answer» D. None of these | |
| 5. |
Number of base SI units is [MP PET 2003] |
| A. | 4 |
| B. | 7 |
| C. | 3 |
| D. | 5 |
| Answer» C. 3 | |
| 6. |
If only conservative forces are working in the system and we apply some external force |
| A. | \[{{W}_{ext}}=\Delta U\](always) |
| B. | \[{{W}_{\text{conservative}}}=-\Delta U\](always) |
| C. | \[{{W}_{ext}}=\Delta U+\Delta KE\] (always) |
| D. | \[{{W}_{\operatorname{co}nservative}}=-\Delta KE\] |
| Answer» C. \[{{W}_{ext}}=\Delta U+\Delta KE\] (always) | |
| 7. |
The force acting on a body moving along x-axis varies with the position of the particle as shown in the figure. The body is in stable equilibrium at: |
| A. | \[x={{x}_{1}}\] |
| B. | \[x={{x}_{2}}\] |
| C. | both \[{{x}_{1}}\]and \[{{x}_{2}}\] |
| D. | neither \[{{x}_{\text{1}}}\]nor \[{{x}_{2}}\] |
| Answer» C. both \[{{x}_{1}}\]and \[{{x}_{2}}\] | |
| 8. |
The units of modulus of rigidity are [MP PMT 1997] |
| A. | \[N-m\] |
| B. | \[N/m\] |
| C. | \[N-{{m}^{2}}\] |
| D. | \[N/{{m}^{2}}\] |
| Answer» E. | |
| 9. |
Assertion: Radar is used to detect an aeroplane in the sky Reason: Radar works on the principle of reflection of waves. |
| 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. | If assertion is true but reason is false. |
| 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. | |
| 10. |
The unit of \[e.m.f.\]is [CPMT 1986; AFMC 1986] |
| A. | Joule |
| B. | Joule-Coulomb |
| C. | Volt?Coulomb |
| D. | Joule/Coulomb |
| Answer» E. | |
| 11. |
A block of mass m moving with a velocity \[{{v}_{0}}\]on a smooth horizontal floor collides with a light spring of stiffhess k that is rigidly fixed horizontally with a vertical wall. If the maximum force imparted by the spring on the block is F, then |
| A. | \[F\propto \sqrt{m}\] |
| B. | \[F\propto \sqrt{k}\] |
| C. | \[F\propto {{v}_{0}}\] |
| D. | None of these |
| Answer» E. | |
| 12. |
Newton?second is the unit of [CPMT 1984, 85; MP PMT 1984] |
| A. | Velocity |
| B. | Angular momentum |
| C. | Momentum |
| D. | Energy |
| Answer» D. Energy | |
| 13. |
If \[{{u}_{1}}\] and \[{{u}_{2}}\] are the units selected in two systems of measurement and \[{{n}_{1}}\] and \[{{n}_{2}}\] their numerical values, then [SCRA 1986] |
| A. | \[{{n}_{1}}{{u}_{1}}={{n}_{2}}{{u}_{2}}\] |
| B. | \[{{n}_{1}}{{u}_{1}}+{{n}_{2}}{{u}_{2}}=0\] |
| C. | \[{{n}_{1}}{{n}_{2}}={{u}_{1}}{{u}_{2}}\] |
| D. | \[({{n}_{1}}+{{u}_{1}})=({{n}_{2}}+{{u}_{2}})\] |
| Answer» B. \[{{n}_{1}}{{u}_{1}}+{{n}_{2}}{{u}_{2}}=0\] | |
| 14. |
The unit of Stefan's constant \[\sigma \] is [AFMC 1986; MP PET 1992; MP PMT 1992; CBSE PMT 2002] |
| A. | \[W\,{{m}^{-2}}\,{{K}^{-1}}\]. |
| B. | \[W\,{{m}^{2}}\,{{K}^{-4}}\] |
| C. | \[W\,{{m}^{-2}}\,{{K}^{-4}}\] |
| D. | \[W\,{{m}^{-2}}\,{{K}^{4}}\] |
| Answer» D. \[W\,{{m}^{-2}}\,{{K}^{4}}\] | |
| 15. |
The unit of specific resistance is [SCRA 1989; MP PET 1984; CPMT 1975] |
| A. | \[Ohm/c{{m}^{2}}\] |
| B. | \[Ohm/cm\] |
| C. | \[Ohm-cm\] |
| D. | \[{{(Ohm-cm)}^{-1}}\] |
| Answer» D. \[{{(Ohm-cm)}^{-1}}\] | |
| 16. |
Which of the following represents a volt [CPMT 1990; AFMC 1991] |
| A. | Joule/second |
| B. | Watt/Ampere |
| C. | Watt/Coulomb |
| D. | Coulomb/Joule |
| Answer» C. Watt/Coulomb | |
| 17. |
The unit of power is [CPMT 1985] |
| A. | Joule |
| B. | Joule per second only |
| C. | Joule per second and watt both |
| D. | Only watt |
| Answer» D. Only watt | |
| 18. |
Assertion: Out of three measurements l = 0.7 m; l = 0.70 m and l = 0.700 m, the last one is most accurate. Reason: In every measurement, only the last significant digit is not accurately known. |
| 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. | If assertion is true but reason is false. |
| D. | If the assertion and reason both are false. |
| E. | If assertion is false but reason is true. |
| Answer» C. If assertion is true but reason is false. | |
| 19. |
A cube has numerically equal volume and surface area. The volume of such a cube is [CPMT 1971, 74] |
| A. | 216 units |
| B. | 1000 units |
| C. | 2000 units |
| D. | 3000 units |
| Answer» B. 1000 units | |
| 20. |
A particle of mass m collides inelastically with another particle of mass 3m which is at rest. After the collision first particle comes to rest. Then choose the wrong answer |
| A. | coefficient of restitution between the particles is \[1/3\] |
| B. | loss of kinetic energy during collision is \[\left( 1/3 \right)m{{v}^{2}}\] |
| C. | velocity of second particle after collision is\[v/3\]. |
| D. | all of these |
| Answer» E. | |
| 21. |
Assertion: When we change the unit of measurement of a quantity, its numerical value changes. Reason: Smaller the unit of measurement smaller is its numerical value. |
| 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. | If assertion is true but reason is false. |
| D. | If the assertion and reason both are false. |
| E. | If assertion is false but reason is true. |
| Answer» D. If the assertion and reason both are false. | |
| 22. |
Unit of moment of inertia in MKS system [MP PMT 1984] |
| A. | \[kg\times c{{m}^{2}}\] |
| B. | \[kg/c{{m}^{2}}\] |
| C. | \[kg\times {{m}^{2}}\] |
| D. | \[Joule\times m\] |
| Answer» D. \[Joule\times m\] | |
| 23. |
One yard in SI units is equal [MP PMT 1995] |
| A. | 1.9144 \[metre\] |
| B. | 0.9144 \[metre\] |
| C. | 0.09144 \[kilometre\] |
| D. | 1.0936 \[kilometre\] |
| Answer» C. 0.09144 \[kilometre\] | |
| 24. |
The SI unit of momentum is [SCRA 1986, 89; CPMT 1987] |
| A. | \[\frac{kg}{m}\] |
| B. | \[\frac{kg.m}{\sec }\] |
| C. | \[\frac{kg.{{m}^{2}}}{\sec }\] |
| D. | \[kg\times Newton\] |
| Answer» C. \[\frac{kg.{{m}^{2}}}{\sec }\] | |
| 25. |
One Mach number is equal to |
| A. | Velocity of light |
| B. | Velocity of sound \[(332\,\,m/\sec )\] |
| C. | \[1\,\,km/\sec \] |
| D. | \[1\,m/\sec \] |
| Answer» C. \[1\,\,km/\sec \] | |
| 26. |
Candela is the unit of [UPSEAT 1999; CPMT 2003] |
| A. | Electric intensity |
| B. | Luminous intensity |
| C. | Sound intensity |
| D. | None of these |
| Answer» C. Sound intensity | |
| 27. |
An inertial frame S' is moving with a constant velocity with respect to another inertial frame s. Then |
| A. | kinetic energy of an object when viewed from S and S' will be different |
| B. | work done on an object when evaluated in frame S and S' will be different |
| C. | work energy theorem is valid in all inertial frames |
| D. | all of these |
| Answer» E. | |
| 28. |
A uniform rectangular marble slab is 3.4 m long and 2.0 m wide. It has a mass of 180 kg. If it is originally lying on the flat ground, how much work is needed to stand it on an end? |
| A. | 2.0 kJ |
| B. | 3.0 J |
| C. | 3.0 kJ |
| D. | 3000 kJ |
| Answer» D. 3000 kJ | |
| 29. |
A force \[\overset{\to }{\mathop{F}}\,=-k(y\hat{i}+x\hat{j})\] acts on a particle moving in the x -y plane. Starting from the origin, the particle is taken along the positive x-axis to the point (a, 0) and then parallel to the j'-axis to the point (a, a). The total work done by the force is |
| A. | \[-2k{{a}^{2}}\] |
| B. | \[2\,\,k{{a}^{2}}\] |
| C. | \[-k{{a}^{2}}\] |
| D. | \[k{{a}^{2}}\] |
| Answer» D. \[k{{a}^{2}}\] | |
| 30. |
DIRECTION: In the following questions, more than one of the answers given are correct. Select the correct answers and mark it according to the following codes: Codes A man pushes a wall and fails to displace it. Choose incorrect statements related to his work (1) Negative work (2) Positive but not maximum work (3) Maximum work (4) No work at all |
| A. | 1, 2 and 3 are correct |
| B. | 1 and 2 are correct |
| C. | 2 and 4 are correct |
| D. | 1 and 3 are correct |
| Answer» B. 1 and 2 are correct | |
| 31. |
DIRECTION: In the following questions, more than one of the answers given are correct. Select the correct answers and mark it according to the following codes: Codes Choose the correct options - (1) The work done by forces may be equal to change in kinetic energy (2) The work done by forces may be equal to change in potential energy (3) The work done by forces may be equal to change in total energy (4) The work done by forces must be equal to change in potential energy. |
| A. | 1, 2 and 3 are correct |
| B. | 1 and 2 are correct |
| C. | 2 and 4 are correct |
| D. | 1 and 3 are correct |
| Answer» B. 1 and 2 are correct | |
| 32. |
The equation \[\left( P+\frac{a}{{{v}^{2}}} \right)\] \[(v-b)\] constant. The units of \[a\] are [MNR 1995; AFMC 1995] |
| A. | \[Dyne\times c{{m}^{5}}\] |
| B. | \[Dyne\times c{{m}^{4}}\] |
| C. | \[Dyne/c{{m}^{3}}\] |
| D. | \[Dyne/c{{m}^{2}}\] |
| Answer» C. \[Dyne/c{{m}^{3}}\] | |
| 33. |
Which one of the following is not a unit of young's modulus [KCET 2005] |
| A. | \[N{{m}^{-1}}\] |
| B. | \[N{{m}^{-2}}\] |
| C. | \[Dyne\ c{{m}^{-2}}\] |
| D. | Mega Pascal |
| Answer» B. \[N{{m}^{-2}}\] | |
| 34. |
A body of mass m accelerates uniformly from rest to a speed \[\left( \lambda \right)\]in time \[\infty \]. The work done on the body till any time t is |
| A. | \[\frac{1}{2}mv_{0}^{2}\left( \frac{{{t}^{2}}}{t_{0}^{2}} \right)\] |
| B. | \[\frac{1}{2}mv_{0}^{2}\left( \frac{{{t}_{0}}}{t} \right)\] |
| C. | \[mv_{0}^{2}\left( \frac{t}{{{t}_{0}}} \right)\] |
| D. | \[mv_{0}^{2}{{\left( \frac{t}{{{t}_{0}}} \right)}^{3}}\] |
| Answer» B. \[\frac{1}{2}mv_{0}^{2}\left( \frac{{{t}_{0}}}{t} \right)\] | |
| 35. |
The unit of the coefficient of viscosity in S.I. system is [J & K CET 2004] |
| A. | \[m/kg\text{-}s\] |
| B. | \[m\text{-}s/k{{g}^{2}}\] |
| C. | \[kg/m\text{-}{{s}^{2}}\] |
| D. | \[kg/m\text{-}s\] |
| Answer» E. | |
| 36. |
The unit of self-inductance of a coil is [MP PMT 1983, 92; SCRA 1986; CBSE PMT 1993; CPMT 1984, 85, 87] |
| A. | Farad |
| B. | Henry |
| C. | Weber |
| D. | Tesla |
| Answer» C. Weber | |
| 37. |
\[Kilowatt-hour\] is a unit of [NCERT 1975; AFMC 1991] |
| A. | Electrical charge |
| B. | Energy |
| C. | Power |
| D. | Force |
| Answer» C. Power | |
| 38. |
A ball of mass m hits a wall with a speed v making an angle \[\frac{5g}{14}\] with the normal. If the coefficient is e, the direction and magnitude of the velocity of ball after reflection from the wall will respectively be - |
| A. | \[{{\tan }^{-1}}\left( \frac{\tan \theta }{e} \right),\,v\sqrt{{{\sin }^{2}}\theta +{{e}^{2}}{{\cos }^{2}}\theta }\] |
| B. | \[{{\tan }^{-1}}\left( \frac{e}{\tan \theta } \right),\frac{1}{v}\sqrt{{{e}^{2}}{{\sin }^{2}}\theta +{{\cos }^{2}}\theta }\] |
| C. | \[{{\tan }^{-1}}(e\tan \theta ),\frac{v}{e}\tan \theta \] |
| D. | \[{{\tan }^{-1}}(e\tan \alpha ),v\sqrt{{{\sin }^{2}}\theta +{{e}^{2}}}\] |
| Answer» B. \[{{\tan }^{-1}}\left( \frac{e}{\tan \theta } \right),\frac{1}{v}\sqrt{{{e}^{2}}{{\sin }^{2}}\theta +{{\cos }^{2}}\theta }\] | |
| 39. |
The ratio of masses of two balls is 2 : 1 and before collision the ratio of their velocities is 1 : 2 in mutually opposite direction. After collision each ball moves in an opposite direction to its initial direction. If e = (5/6), the ratio of speed of each ball before and after collision would be |
| A. | (5/6) times |
| B. | Equal |
| C. | Not related |
| D. | Double for the first ball and half for the second ball |
| Answer» B. Equal | |
| 40. |
Two identical billiard balls are in contact on a table. A third identical ball strikes them symmetrically and comes to rest after impact. The coefficient of restitution is |
| A. | \[\frac{2}{3}\] |
| B. | \[\frac{1}{3}\] |
| C. | \[\frac{1}{6}\] |
| D. | \[\frac{\sqrt{3}}{2}\] |
| Answer» B. \[\frac{1}{3}\] | |
| 41. |
To determine the Young's modulus of a wire, the formula is \[Y=\frac{F}{A}:\frac{L}{\Delta L};\] where \[L\] = length, \[A=\]area of cross-section of the wire, \[\Delta L=\]change in length of the wire when stretched with a force \[F\]. The conversion factor to change it from CGS to MKS system is [MP PET 1983] |
| A. | 1 |
| B. | 10 |
| C. | 0.1 |
| D. | 0.01 |
| Answer» D. 0.01 | |
| 42. |
Which relation is wrong [RPMT 1997] |
| A. | 1 Calorie = 4.18 Joules |
| B. | \[1{\AA}={{10}^{-10}}m\] |
| C. | \[1\,\,MeV=1.6\times {{10}^{-13}}Joules\] |
| D. | \[1\,Newton={{10}^{-5}}Dynes\] |
| Answer» E. | |
| 43. |
Which of the following is not a unit of time [UPSEAT 2001] |
| A. | Leap year |
| B. | Micro second |
| C. | Lunar month |
| D. | Light year |
| Answer» E. | |
| 44. |
One nanometre is equal to [SCRA 1986; MNR 1986] |
| A. | \[{{10}^{9}}mm\]. |
| B. | \[{{10}^{-6}}\,cm\] |
| C. | \[{{10}^{-7}}cm\] |
| D. | \[{{10}^{-9}}cm\] |
| Answer» D. \[{{10}^{-9}}cm\] | |
| 45. |
SI unit of pressure is [EAMCET 1980; DPMT 1984; CBSE PMT 1988; NCERT 1976; AFMC 1991; USSR MEE 1991] |
| A. | Pascal |
| B. | \[Dynes/c{{m}^{2}}\] |
| C. | \[cm\,\] of \[Hg\] |
| D. | Atmosphere |
| Answer» B. \[Dynes/c{{m}^{2}}\] | |
| 46. |
Unit of energy is [NCERT 1974; CPMT 1975] |
| A. | \[J/\sec \] |
| B. | \[Watt-day\] |
| C. | \[Kilowatt\] |
| D. | \[gm\text{-}cm/{{\sec }^{2}}\] |
| Answer» C. \[Kilowatt\] | |
| 47. |
Block 1 and Block 2 are again released from \[h=1.2\text{ }m.\] Block 1 flies off the track end at 30° and Block 2 at \[45{}^\circ \]. Their speeds when they hit the floor 1 meter below the track end: |
| A. | are smaller for Block 1 than Block 2. |
| B. | are larger for Block 1 than Block 2. |
| C. | are the same for Block 1 and Block 2. |
| D. | depend on mass and angle, so the question cannot be answered. |
| Answer» D. depend on mass and angle, so the question cannot be answered. | |
| 48. |
A body of mass m dropped from a certain height strikes a light vertical fixed spring of stiffness k. The height of its fall before touching the spring if the maximum compression of the spring is equal to \[\frac{3mg}{k}\] is: |
| A. | \[\frac{KQ}{R}\] |
| B. | \[\frac{KQ}{\ell }\] |
| C. | \[\frac{KQ}{\sqrt{{{R}^{2}}+{{\ell }^{2}}}}\] |
| D. | \[\frac{mg}{4K}\] |
| Answer» B. \[\frac{KQ}{\ell }\] | |
| 49. |
The particle is released from a height h. At a certain height, its KE is two times its potential energy Height and speed of the particle at that instant are |
| A. | \[\frac{h}{3},\,\frac{\sqrt{2gh}}{3}\] |
| B. | \[\frac{h}{3},\,\frac{\sqrt{gh}}{3}\] |
| C. | \[\frac{2h}{3},\,\frac{\sqrt{2gh}}{3}\] |
| D. | \[\frac{h}{3},\,\sqrt{2gh}\] |
| Answer» C. \[\frac{2h}{3},\,\frac{\sqrt{2gh}}{3}\] | |
| 50. |
Oersted is a unit of [SCRA 1989] |
| A. | Dip |
| B. | Magnetic intensity |
| C. | Magnetic moment |
| D. | Pole strength |
| Answer» C. Magnetic moment | |