MCQOPTIONS
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MCQOPTIONS
This section includes 563 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge (GK) knowledge and support exam preparation. Choose a topic below to get started.
| 451. |
A person can jump higher on the moon's surface than on the earth because |
| A. | the moon's surface is rough |
| B. | the acceleration due to gravity in moon is smaller than that on the earth. |
| C. | the moon is cooler than earth |
| D. | the moon has no atmosphere |
| Answer» C. the moon is cooler than earth | |
| 452. |
How much mechanical work must be done to completely melt 1 gram of ice at 0 C? |
| A. | 4.2 J |
| B. | 80 J |
| C. | 336 J |
| D. | 2268 J |
| Answer» C. 336 J | |
| 453. |
If a bomb dropped from an airplane explodes in mid-air . |
| A. | its KE increases |
| B. | its total energy increases |
| C. | its total energy decreases |
| D. | its total momentum decreases |
| Answer» B. its total energy increases | |
| 454. |
A cycle tyre bursts suddenly. This represents an |
| A. | Isothermal process |
| B. | Adiabatic process |
| C. | Isochoric process |
| D. | Isoboric process |
| Answer» C. Isochoric process | |
| 455. |
A light ray travelling from denser to rarer medium at an angle of incidence more than critical angle of concerned media pair suffers. |
| A. | reflection |
| B. | refraction |
| C. | diffraction |
| D. | total internal reflection |
| Answer» E. | |
| 456. |
A bomb explodes on the moon. You will hear its sound on earth after |
| A. | 20 minutes |
| B. | 2 hours 20 minutes |
| C. | 3.7 hours |
| D. | You cannot hear the sound of explosion |
| Answer» E. | |
| 457. |
If the length of a simple pendulum is halved then its period of oscillation is - |
| A. | doubled |
| B. | halved |
| C. | increased by a factor 2 |
| D. | decreased by a factor 2 |
| Answer» E. | |
| 458. |
Work done upon a body . |
| A. | only a vector quantity |
| B. | only a scalar quantity |
| C. | both vector and scalar |
| D. | neither vector nor scalar |
| Answer» C. both vector and scalar | |
| 459. |
The moon that we see in the sky is a |
| A. | Planet |
| B. | Star |
| C. | Sun |
| D. | Satellite |
| Answer» E. | |
| 460. |
Hyperrnetropia or longsight can be corrected by using : |
| A. | Bifocal lenses |
| B. | Cylindrical lenses |
| C. | Concave lenses |
| D. | Convex lenses |
| Answer» E. | |
| 461. |
One nanometer is equal to meters. |
| A. | 10 raised to the power (-3) |
| B. | 10 raised to the power (-6) |
| C. | 10 raised to the power (-9) |
| D. | 10 raised to the power (-12) |
| Answer» D. 10 raised to the power (-12) | |
| 462. |
The mean distance from the Sun to the Earth is called: |
| A. | Light year |
| B. | Astronomical Unit |
| C. | Parallactic Second |
| D. | Angstrom |
| Answer» C. Parallactic Second | |
| 463. |
The scientist who first discovered that the Earth revolves round the Sun was - |
| A. | Newton |
| B. | Dalton |
| C. | Copernicus |
| D. | Einsteirn |
| Answer» D. Einsteirn | |
| 464. |
Hydrogen bomb is based on the principle of - |
| A. | Double decomposition |
| B. | Artificial radioactivity |
| C. | Nuclear fission |
| D. | Nuclear fusion |
| Answer» E. | |
| 465. |
The period of revolution of a geo- stationary satellite is |
| A. | 365 days |
| B. | 30 days |
| C. | 24 hours |
| D. | changing continuously |
| Answer» D. changing continuously | |
| 466. |
The type of minor used in automobiles to see the traffic on the rear side is |
| A. | Concave |
| B. | Plano-Convex |
| C. | Plane |
| D. | Convex |
| Answer» E. | |
| 467. |
Formation of shadows can be explained by - |
| A. | rectilinear propagation of light |
| B. | reflection |
| C. | refraction |
| D. | total internal reflection |
| Answer» B. reflection | |
| 468. |
One micron is equal to- |
| A. | 1/10th of mm |
| B. | 1/100th of mm |
| C. | 1/1000th of mm |
| D. | 1/10000th of mm |
| Answer» D. 1/10000th of mm | |
| 469. |
Suns heat reaches us by |
| A. | Conduction |
| B. | Convection |
| C. | Radiation |
| D. | Reflection |
| Answer» D. Reflection | |
| 470. |
The surface temperature of the Sun is nearly - |
| A. | 2000K |
| B. | 4000K |
| C. | 6000K |
| D. | 8000K |
| Answer» D. 8000K | |
| 471. |
Hydrogen atom is excited from ground state to another state with principal quantum number equal to 4. Then the number of spectral lines in the emission spectra will be - |
| A. | 2 |
| B. | 6 |
| C. | 5 |
| D. | 3 |
| Answer» C. 5 | |
| 472. |
The spring balance works on the principle of - |
| A. | Boyle's Law |
| B. | Hooke's Law |
| C. | Bernoulli's principle |
| D. | Pascal's Law |
| Answer» C. Bernoulli's principle | |
| 473. |
What principle/law explains the working of the hydraulic brakes in automobiles? |
| A. | Bernoulli's law |
| B. | Posieulli's principle |
| C. | Pascal's law |
| D. | Archimedes' principle |
| Answer» D. Archimedes' principle | |
| 474. |
The passengers standing in a bus fall in the backward direction when the stationary bus begins to move. Which of the following laws explains this situation? |
| A. | Newton's First Law of Motion |
| B. | Newton's Third Law of Motion |
| C. | Newton's Second Law of Motion |
| D. | The Law of Conservation of Momentum |
| Answer» B. Newton's Third Law of Motion | |
| 475. |
In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie? |
| A. | Visible |
| B. | Infrared |
| C. | Ultraviolet |
| D. | X-ray |
| Answer» D. X-ray | |
| 476. |
Rain drops acquire spherical shape due to - |
| A. | viscosity |
| B. | surface tension |
| C. | friction |
| D. | elasticity |
| Answer» C. friction | |
| 477. |
X- rays are waves. |
| A. | Longitudinal |
| B. | Transverse |
| C. | Electromagnetic |
| D. | Elastic |
| Answer» D. Elastic | |
| 478. |
A transformer works on the principle of |
| A. | Self induction |
| B. | Mutual induction |
| C. | Generator |
| D. | Inverter |
| Answer» C. Generator | |
| 479. |
A solid needle placed horizon-tally on the surface of the water floats due to |
| A. | capillary action |
| B. | water pressure |
| C. | surface tension of water |
| D. | viscosity of water |
| Answer» D. viscosity of water | |
| 480. |
A moving neutron collides with a stationary -particle. The fraction of the kinetic energy lost by the neutron is |
| A. | |
| B. | 1/16 |
| C. | 9/25 |
| D. | 16/25 |
| Answer» E. | |
| 481. |
An a-particle is . |
| A. | A hydrogen molecule |
| B. | A helium nucleus |
| C. | An atom of hydrogen |
| D. | A proton |
| Answer» C. An atom of hydrogen | |
| 482. |
What is the physical state of water at 12 C? |
| A. | Gas |
| B. | Solid |
| C. | Liquid |
| D. | Ionic |
| Answer» D. Ionic | |
| 483. |
The following particles move with same kinetic energy. Which of them has maximum momentum? |
| A. | Electron |
| B. | Proton |
| C. | Deutron |
| D. | Alpha Particle |
| Answer» E. | |
| 484. |
Fibre optics work on the principle of - |
| A. | scattering of light |
| B. | total internal absorption |
| C. | total internal reflection |
| D. | option rotation |
| Answer» D. option rotation | |
| 485. |
The first synthetic fibre made by man was- |
| A. | Rayon |
| B. | Nylon |
| C. | Polyester |
| D. | Terycott |
| Answer» C. Polyester | |
| 486. |
The dimensional formula ML T corresponds to |
| A. | Modulus of elasticity |
| B. | Viscosity |
| C. | Moment of a force |
| D. | Thrust |
| Answer» B. Viscosity | |
| 487. |
The distance between node and adjacent antinodes is 30 cm. The wavelength is - |
| A. | 30 cm. |
| B. | 90 cm. |
| C. | 120 cm. |
| D. | 60 cm. |
| Answer» E. | |
| 488. |
The dimension of which of the following is the same as that of impulse? |
| A. | Volume |
| B. | Momentum |
| C. | Torque |
| D. | Change in the rate of momentum |
| Answer» C. Torque | |
| 489. |
A proton is identical to . |
| A. | the nucleus of helium |
| B. | the nucleus of a hydrogen atom |
| C. | an alpha-particle |
| D. | a beta particle |
| Answer» E. | |
| 490. |
Which of the following physical quantities has no dimension? |
| A. | Force |
| B. | Momentum |
| C. | Impulse |
| D. | Angle |
| Answer» E. | |
| 491. |
The dimension MLT corresponds to |
| A. | force |
| B. | work done |
| C. | acceleration |
| D. | velocity |
| Answer» B. work done | |
| 492. |
Which type of mirror is used in the head lights of vehicles? |
| A. | Plane mirror |
| B. | Concave mirror |
| C. | Convex mirror |
| D. | Parabolic mirror |
| Answer» C. Convex mirror | |
| 493. |
In a refrigerator, the cooling system should always be |
| A. | at the top |
| B. | at the bottom |
| C. | at the middle |
| D. | can be anywhere |
| Answer» C. at the middle | |
| 494. |
is the perpendicular distance between point of application of force and axis of rotation. |
| A. | Moment arm |
| B. | Moment of Inertia |
| C. | Altitude |
| D. | Base |
| Answer» B. Moment of Inertia | |
| 495. |
If in a motion, the axis of the rotation passes through an object, then the motion is called. |
| A. | Orbital motion |
| B. | Circulatory motion |
| C. | Spin motion |
| D. | Oscillatory motion |
| Answer» D. Oscillatory motion | |
| 496. |
0 K, is equivalent to |
| A. | 273 C |
| B. | -273 C |
| C. | 0 C |
| D. | 100 C |
| Answer» C. 0 C | |
| 497. |
Convex mirror is generally used in - |
| A. | solar cookers |
| B. | opthalmoscope |
| C. | reflector for head light |
| D. | rear view mirror |
| Answer» E. | |
| 498. |
Which one among the following doesn't have any effect on velocity of sound? |
| A. | Pressure |
| B. | Temperature |
| C. | Humidity |
| D. | Density |
| Answer» D. Density | |
| 499. |
Radio telescopes are better than optical telescopes because - |
| A. | they can detect faint galaxies which no optical telescope can |
| B. | they can work even in cloudy conditions |
| C. | they can work during the day and night |
| D. | All of the above |
| Answer» E. | |
| 500. |
An object is placed on the principal axis of a convex lens of focal length 10 cm. If the distance of the object from the lens is 30 cm, what is the distance of the image formed? |
| A. | 20 cm |
| B. | 15 cm |
| C. | 30 cm |
| D. | 10 cm |
| Answer» C. 30 cm | |