MCQOPTIONS
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MCQOPTIONS
This section includes 467 Mcqs, each offering curated multiple-choice questions to sharpen your Railways knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The unit of the Stefan-Boltzmann's constant is |
| A. | \[W/{{m}^{2}}{{K}^{4}}\] |
| B. | \[W/{{m}^{2}}\] |
| C. | \[W/{{m}^{2}}K\] |
| D. | \[W/{{m}^{2}}{{K}^{2}}\] |
| Answer» B. \[W/{{m}^{2}}\] | |
| 2. |
The speed at any instant of time is known as |
| A. | average speed |
| B. | velocity |
| C. | given speed |
| D. | instantaneous speed |
| Answer» E. | |
| 3. |
Dimensions of capacitance are |
| A. | \[[{{M}^{-1}}{{L}^{-2}}{{T}^{4}}{{A}^{2}}]\] |
| B. | \[[ML{{T}^{-3}}{{A}^{-1}}]\] |
| C. | \[[M{{L}^{2}}{{T}^{-3}}{{A}^{-1}}]\] |
| D. | \[[{{M}^{-1}}{{L}^{-2}}{{T}^{3}}{{A}^{-1}}]\] |
| Answer» B. \[[ML{{T}^{-3}}{{A}^{-1}}]\] | |
| 4. |
The ratio of the numerical values of the average velocity and average speed of a body is |
| A. | unity |
| B. | unity or less |
| C. | (e) unity or more |
| D. | less than unity |
| Answer» C. (e) unity or more | |
| 5. |
The 2 measurements necessary for calculating average acceleration are |
| A. | instantaneous velocity & time |
| B. | Change in velocity and time |
| C. | Distance and speed |
| D. | Velocity and distance |
| Answer» C. Distance and speed | |
| 6. |
The ____ of a distance versus time graph is speed. |
| A. | slope |
| B. | y-intercept |
| C. | origin |
| D. | none of the answers |
| Answer» B. y-intercept | |
| 7. |
The type of energy possessed by a simple pendulum, when it is at the mean position is |
| A. | kinetic energy |
| B. | potential energy |
| C. | potential energy + kinetic energy |
| D. | sound energy |
| Answer» B. potential energy | |
| 8. |
Work done will be zero if the angle between force and distance is |
| A. | \[30{}^\circ \] |
| B. | \[90{}^\circ \] |
| C. | \[180{}^\circ \] |
| D. | \[60{}^\circ \] |
| Answer» C. \[180{}^\circ \] | |
| 9. |
Universal time is based on |
| A. | rotation of the earth on its axis |
| B. | earth's orbital motion around the sun |
| C. | vibrations of cesium atom |
| D. | oscillations of quartz crystal |
| Answer» D. oscillations of quartz crystal | |
| 10. |
Let\[[{{\in }_{0}}]\]denote the dimensional formula of the permittivity of vacuum. If M = mass, L = length, T = time and A = electric current, then: |
| A. | \[{{\in }_{0}}=[{{M}^{-1}}{{L}^{-3}}{{T}^{2}}A]\] |
| B. | \[{{\in }_{0}}=[{{M}^{1}}{{L}^{-3}}{{T}^{4}}{{A}^{2}}]\] |
| C. | \[{{\in }_{0}}=[{{M}^{1}}{{L}^{2}}{{T}^{1}}{{A}^{2}}]\] |
| D. | \[{{\in }_{0}}=[{{M}^{1}}{{L}^{2}}{{T}^{1}}A]\] |
| Answer» C. \[{{\in }_{0}}=[{{M}^{1}}{{L}^{2}}{{T}^{1}}{{A}^{2}}]\] | |
| 11. |
If length of pendulum is increased by 2%. The time period will |
| A. | Increases by 1% |
| B. | Decreases by 1% |
| C. | Increases by 2% |
| D. | Decreases by 2% |
| Answer» B. Decreases by 1% | |
| 12. |
A light and heavy body have equal momentam. Which one has greater kinetic energy? |
| A. | The light body |
| B. | The heavy body |
| C. | Both have same KE |
| D. | None of these |
| Answer» B. The heavy body | |
| 13. |
A car stopped screeching to avoid crash with a van, change is involved in process is |
| A. | Kinetic energy is converted into sound energy |
| B. | Kinetic Energy is converted into sound and thermal energy |
| C. | Potential energy is converted into sound, heat and kinetic energy |
| D. | Kinetic and potential energy is converted into thermal and sound energy |
| Answer» C. Potential energy is converted into sound, heat and kinetic energy | |
| 14. |
A constant force on an object given by product of force and distance moved by object in direction of force is termed as |
| A. | Work done |
| B. | Efficiency |
| C. | Power |
| D. | Energy |
| Answer» B. Efficiency | |
| 15. |
Pendulum bob cannot attain its initial height because |
| A. | it continues to lose energy in thermal form |
| B. | it continues to lose energy in sound form |
| C. | it continues to lose energy in light form |
| D. | it continues to lose energy in potential form |
| Answer» B. it continues to lose energy in sound form | |
| 16. |
Potential energy and kinetic energy are types of |
| A. | Electrical energy |
| B. | Magnetic energy |
| C. | Thermal energy |
| D. | Mechanical energy |
| Answer» E. | |
| 17. |
Pendulum bob stops moving when all its original gain in gravitational potential energy has been converted to |
| A. | Sound Energy |
| B. | Thermal Energy |
| C. | Light Energy |
| D. | Kinetic Energy |
| Answer» C. Light Energy | |
| 18. |
The dimensions of gravitational constant G are |
| A. | \[[ML{{T}^{-2}}]\] |
| B. | \[[M{{L}^{3}}{{T}^{-2}}]\] |
| C. | \[[{{M}^{-1}}{{L}^{3}}{{T}^{-2}}]\] |
| D. | \[[{{M}^{-1}}L{{T}^{-2}}]\] |
| Answer» D. \[[{{M}^{-1}}L{{T}^{-2}}]\] | |
| 19. |
Kinetic energy with mass 'm' and velocity 'v' is |
| A. | \[2\,\,m{{v}^{2}}\] |
| B. | \[1/2\,\,mv\] |
| C. | \[2mD{{v}^{2}}\] |
| D. | \[1/2\,\,m{{v}^{2}}\] |
| Answer» E. | |
| 20. |
Ratio of required form of energy obtained from a system as output to total energy given to it as input is called it's |
| A. | efficiency |
| B. | power |
| C. | stress |
| D. | strain |
| Answer» B. power | |
| 21. |
When we raised up a hammer, energy possessed is called |
| A. | kinetic energy |
| B. | chemical energy |
| C. | nuclear energy |
| D. | potential energy |
| Answer» E. | |
| 22. |
If direction of motion of force is perpendicular to direction of motion of body, and then work done will be |
| A. | minimum |
| B. | zero |
| C. | maximum |
| D. | none of above |
| Answer» C. maximum | |
| 23. |
A nuclear reactor generates electricity by using |
| A. | thermal energy |
| B. | nuclear energy |
| C. | mechanical energy |
| D. | chemical energy |
| Answer» C. mechanical energy | |
| 24. |
A system which gives an output equal to total energy used by it is called |
| A. | negative system |
| B. | non-ideal system |
| C. | ideal system |
| D. | slow system |
| Answer» D. slow system | |
| 25. |
One \[Wb/{{m}^{2}}\]is equal to |
| A. | \[{{10}^{4}}\]gauss |
| B. | \[4\pi \times {{10}^{-3}}\] gauss |
| C. | \[{{10}^{2}}\] gauss |
| D. | \[{{10}^{-4}}\] gauss |
| Answer» B. \[4\pi \times {{10}^{-3}}\] gauss | |
| 26. |
The dimensions of electric potential are: |
| A. | \[[M{{L}^{2}}{{T}^{-2}}{{Q}^{-1}}]\] |
| B. | \[[ML{{T}^{-2}}{{Q}^{-1}}]\] |
| C. | \[[M{{L}^{2}}{{T}^{-1}}Q]\] |
| D. | \[[M{{L}^{2}}{{T}^{-2}}Q]\] |
| Answer» B. \[[ML{{T}^{-2}}{{Q}^{-1}}]\] | |
| 27. |
Velocity time curve for a body projected vertically upwards is |
| A. | parabola |
| B. | ellipse |
| C. | hyperbola |
| D. | straight line |
| Answer» E. | |
| 28. |
A particle moves from (2,3) m to (4,1) m. The displacement vector is |
| A. | \[2i+2jm\] |
| B. | \[-2i-2jm\] |
| C. | \[2i-2jm\] |
| D. | \[-2i+2jm\] |
| Answer» D. \[-2i+2jm\] | |
| 29. |
Speed of a body in particular direction can be called |
| A. | acceleration |
| B. | displacement |
| C. | velocity |
| D. | distance |
| Answer» D. distance | |
| 30. |
Solar energy can also be converted directly into electricity by |
| A. | solar cars |
| B. | mercury |
| C. | plasma |
| D. | solar cells |
| Answer» E. | |
| 31. |
An electric lamp produces |
| A. | light energy |
| B. | heat energy |
| C. | both A and B |
| D. | electrical energy |
| Answer» D. electrical energy | |
| 32. |
If the displacement of a body varies as the square of elapsed time, then its |
| A. | velocity is constant |
| B. | velocity varies non-uniformly |
| C. | acceleration is constant |
| D. | acceleration changes continuously |
| Answer» D. acceleration changes continuously | |
| 33. |
Choose the correct equation to determine distance in a straight line for a body with uniform motion. |
| A. | \[s=\frac{v}{t}\] |
| B. | \[s={{v}^{2}}t\] |
| C. | \[s=ut+\frac{1}{2}g{{t}^{2}}\] |
| D. | \[s=v\times {{t}^{2}}\] |
| Answer» D. \[s=v\times {{t}^{2}}\] | |
| 34. |
Dimensions of \[\frac{1}{{{\mu }_{0}}{{\varepsilon }_{0}}}\], where symbols have their usual meaning, are |
| A. | \[[{{M}^{0}}{{L}^{-1}}T]\] |
| B. | \[[{{M}^{0}}{{L}^{-2}}{{T}^{2}}]\] |
| C. | \[[{{M}^{0}}{{L}^{2}}{{T}^{-2}}]\] |
| D. | \[[{{M}^{0}}L{{T}^{-1}}]\] |
| Answer» D. \[[{{M}^{0}}L{{T}^{-1}}]\] | |
| 35. |
The dimensions of shear modulus are |
| A. | \[[ML{{T}^{-1}}]\] |
| B. | \[[M{{L}^{2}}{{T}^{-2}}]\] |
| C. | \[[M{{L}^{-1}}{{T}^{-2}}]\] |
| D. | \[[ML{{T}^{-2}}]\] |
| Answer» D. \[[ML{{T}^{-2}}]\] | |
| 36. |
Knocking a nail into a wooden block with a hammer involves conversion between different forms of energy, which of following choices present this conversion in correct order. |
| A. | chemical energy\[\to \]gravitational potential energy\[\to \]kinetic energy\[\to \](sound energy + heat energy) |
| B. | chemical energy\[\to \]kinetic energy\[\to \]gravitational potential energy\[\to \](sound energy + heat energy) |
| C. | chemical energy\[\to \](sound energy + heat energy)\[\to \]kinetic energy\[\to \]gravitational potential energy |
| D. | (sound energy + heat energy)\[\to \]chemical energy\[\to \]kinetic energy\[\to \]gravitational potential energy |
| Answer» B. chemical energy\[\to \]kinetic energy\[\to \]gravitational potential energy\[\to \](sound energy + heat energy) | |
| 37. |
Wind and waves are used by turbines to convert |
| A. | Mechanical Energy into Electrical Energy |
| B. | Kinetic Energy into Electrical Energy |
| C. | Potential energy into Kinetic Energy |
| D. | Potential Energy into Electrical Energy |
| Answer» C. Potential energy into Kinetic Energy | |
| 38. |
An object of mass 'm' raised to a height '2h' above ground level possesses a gravitational potential energy of |
| A. | \[1/2\times mgh\] |
| B. | mgh |
| C. | 2 mgh |
| D. | \[m\times g/2h\] |
| Answer» D. \[m\times g/2h\] | |
| 39. |
Capacity of a body to do work is called |
| A. | energy |
| B. | workload |
| C. | kinetic energy |
| D. | potential energy |
| Answer» B. workload | |
| 40. |
When a body vibrates, it produces |
| A. | sound |
| B. | water |
| C. | heat |
| D. | electricity |
| Answer» B. water | |
| 41. |
If some energy given to a system, then energy in required form obtained is always |
| A. | less than the given energy |
| B. | equal to the given energy |
| C. | greater than the given energy |
| D. | none of above |
| Answer» B. equal to the given energy | |
| 42. |
The dimensional formula of pressure is |
| A. | \[[ML{{T}^{-2}}]\] |
| B. | \[[M{{L}^{-1}}{{T}^{2}}]\] |
| C. | \[[M{{L}^{-1}}{{T}^{-2}}]\] |
| D. | \[[ML{{T}^{2}}]\] |
| Answer» E. | |
| 43. |
The dimensional formula for permeability |i is given by |
| A. | \[[ML{{T}^{-2}}{{A}^{-2}}]\] |
| B. | \[[{{M}^{0}}{{L}^{1}}T]\] |
| C. | \[[{{M}^{0}}{{L}^{2}}{{T}^{-1}}{{A}^{2}}]\] |
| D. | None of these |
| Answer» B. \[[{{M}^{0}}{{L}^{1}}T]\] | |
| 44. |
Young's modulus of a material has the same unit as |
| A. | pressure |
| B. | strain |
| C. | compressibility |
| D. | force |
| Answer» B. strain | |
| 45. |
The dimensions of \[\left( \frac{1}{2} \right)\,\,{{\varepsilon }_{0}}{{E}^{2}}\](\[{{\varepsilon }_{0}}\]permittivity of free space, E electric field) are |
| A. | \[[ML{{T}^{-1}}]\] |
| B. | \[[M{{L}^{2}}{{T}^{-2}}]\] |
| C. | \[[M{{L}^{-1}}{{T}^{-2}}]\] |
| D. | \[[M{{L}^{2}}{{T}^{-1}}]\] |
| Answer» D. \[[M{{L}^{2}}{{T}^{-1}}]\] | |
| 46. |
A cube has a side of length \[1.2\times {{10}^{-2}}\,\,m\] Calculate its volume |
| A. | \[1.7\times {{10}^{-6}}\,\,{{m}^{3}}\] |
| B. | \[1.73\times {{10}^{-6}}\,\,{{m}^{3}}\] |
| C. | \[1.70\times {{10}^{-6}}\,\,{{m}^{3}}\] |
| D. | \[1.732\times {{10}^{-6}}\,\,{{m}^{3}}\] |
| Answer» B. \[1.73\times {{10}^{-6}}\,\,{{m}^{3}}\] | |
| 47. |
The work done on an object does not depend upon the |
| A. | Displacement |
| B. | Force applied |
| C. | Angle between force and displacement |
| D. | Initial velocity of the object |
| Answer» E. | |
| 48. |
When an object is raised to a certain height above ground, it possesses |
| A. | Chemical Potential Energy |
| B. | Elastic Potential Energy |
| C. | Gravitational Potential Energy |
| D. | Kinetic energy |
| Answer» D. Kinetic energy | |
| 49. |
Acceleration is described as rate of change of |
| A. | distance with time |
| B. | velocity with distance |
| C. | velocity with time |
| D. | distance with velocity |
| Answer» D. distance with velocity | |
| 50. |
Which of the following is the correct expression of instantaneous acceleration? |
| A. | \[a=\frac{\Delta v}{{{(\Delta t)}^{2}}}\] |
| B. | \[a=\frac{dv}{dt}\] |
| C. | \[a=\frac{{{d}^{2}}v}{d{{t}^{2}}}\] |
| D. | \[a={{\left( \frac{\Delta v}{\Delta t} \right)}^{2}}\] |
| Answer» C. \[a=\frac{{{d}^{2}}v}{d{{t}^{2}}}\] | |