MCQOPTIONS
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MCQOPTIONS
This section includes 754 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 451. |
Laplace found that the alternate compressions and rarefactions produced in sound waves follows ________________? |
| A. | isothermal law |
| B. | adiabatic law |
| C. | isochoric law |
| D. | all of the above |
| Answer» C. isochoric law | |
| 452. |
Laminar flow usually occurs at speeds_____________? |
| A. | Low |
| B. | High |
| C. | Very high |
| D. | Some time high and some time low |
| Answer» B. High | |
| 453. |
Joule Thomson effect is based upon __________ ? |
| A. | Sudden compression of gases |
| B. | Sudden expansion of gases |
| C. | Cooling of gases |
| D. | Heating of gases |
| Answer» C. Cooling of gases | |
| 454. |
It is possible to distinguish between transverse and longitudinal waves form the property of __________________? |
| A. | refraction |
| B. | polarization |
| C. | interference |
| D. | diffraction |
| Answer» C. interference | |
| 455. |
It is easier to turn a steering wheel with both hands than with a single hand because______________? |
| A. | Accelerating force increases on the wheel |
| B. | Two forces act on the wheel |
| C. | Two hands provide a firm grip |
| D. | The couple acts on the wheel |
| Answer» E. | |
| 456. |
Irregular flow of fluid is called_______________? |
| A. | Streamline |
| B. | Turbulent |
| C. | Uniform |
| D. | Laminar |
| Answer» C. Uniform | |
| 457. |
Internal resistance is the resistance offered by________________? |
| A. | source of EMF |
| B. | conductor |
| C. | resistor |
| D. | capacitor |
| Answer» B. conductor | |
| 458. |
Instantaneous and average velocities become equal when body___________________? |
| A. | has zero acceleration |
| B. | has uniform acceleration |
| C. | has variable acceleration |
| D. | moves in a circle |
| Answer» B. has uniform acceleration | |
| 459. |
Inertia of an object is quantitative measure of its__________________? |
| A. | volume |
| B. | density |
| C. | mass |
| D. | temperature |
| Answer» D. temperature | |
| 460. |
Increase in velocity of sound in the air for 1°C rise in temperature is_________________? |
| A. | 1.61 ms-1 |
| B. | 61.0 ms-1 |
| C. | 0.61 ms-1 |
| D. | 2.00 ms-1 |
| Answer» D. 2.00 ms-1 | |
| 461. |
Ina liquid metal fast breeder reactor, the type of uranium used is______________? |
| A. | 92U235 |
| B. | 92U238 |
| C. | 92U234 |
| D. | 92U239 |
| Answer» C. 92U234 | |
| 462. |
In Young double slit experiment, if white light is used____________________? |
| A. | alternate dark and bright fringes will be seen |
| B. | coloured fringes will be seen |
| C. | no interference fringes will be seen |
| D. | impossible to predict |
| Answer» C. no interference fringes will be seen | |
| 463. |
In which quadrant the two rectangular components of a vector have same sign ? |
| A. | 1st |
| B. | 2nd |
| C. | Both 1st and 3rd |
| D. | 4th |
| Answer» D. 4th | |
| 464. |
In which quadrant, the only value of tan will be positive ? |
| A. | First |
| B. | Second |
| C. | Third |
| D. | Both 1st and 3rd |
| Answer» E. | |
| 465. |
In which process entropy remains constant________________? |
| A. | isobaric |
| B. | isochoric |
| C. | adiabatic |
| D. | isothermal |
| Answer» D. isothermal | |
| 466. |
In which process all the heat supplied is converted into work done ? |
| A. | isothermal |
| B. | isochoric |
| C. | isobaric |
| D. | isentropic |
| Answer» B. isochoric | |
| 467. |
In vibratory motion_________________? |
| A. | P.E. remains constant |
| B. | K.E. remain constant |
| C. | total energy remains constant |
| D. | total momentum remains constant |
| Answer» D. total momentum remains constant | |
| 468. |
In vibrating cord the points where the amplitude is maximum, are called ___________________? |
| A. | antinodes |
| B. | nodes |
| C. | troughs |
| D. | crests |
| Answer» B. nodes | |
| 469. |
In the transistor schematic symbol, the arrow______________? |
| A. | is located on the emitter |
| B. | is located on the base |
| C. | is locate on the collector |
| D. | points form north to south |
| Answer» B. is located on the base | |
| 470. |
In the transistor schematic symbol, the arrow_______________? |
| A. | is located on the emitter |
| B. | is located on the base |
| C. | is locate on the collector |
| D. | points form north to south |
| Answer» B. is located on the base | |
| 471. |
In the shadow of a ball the central portion appears bright that happens due to_________________? |
| A. | Interference |
| B. | Diffraction |
| C. | Polarization |
| D. | Refraction |
| Answer» C. Polarization | |
| 472. |
In the nucleus of uranium, the number of neutrons will be _____________? |
| A. | 92 |
| B. | 235 |
| C. | 143 |
| D. | Different for different isotopes |
| Answer» E. | |
| 473. |
In the following figure, the terminal potential is ___________________ ? |
| A. | zero |
| B. | 2V |
| C. | 12V |
| D. | 36V |
| Answer» B. 2V | |
| 474. |
In the electron microscope, electric & magnetic fields are used as_______________? |
| A. | Electromagnetic gun |
| B. | Source of electromagnetic waves |
| C. | Deflecting charged particle |
| D. | Converging source of electrons |
| Answer» E. | |
| 475. |
In the capacitive circuit the current___________________? |
| A. | Lags behind voltage by π/2 |
| B. | Is in phase with voltage |
| C. | Opposite in phase of voltage by π |
| D. | Leads forward the voltage by π/2 |
| Answer» E. | |
| 476. |
In simple cube one atom or molecule lies at its______________________? |
| A. | Force corners |
| B. | Nine corners |
| C. | Eight corners |
| D. | Six corners |
| Answer» D. Six corners | |
| 477. |
In S.H.M. the velocity of a particle is maximum at________________? |
| A. | mean position |
| B. | extreme position |
| C. | middle between the mean and extreme position on the right side |
| D. | middle between the mean and extreme position on the left side |
| Answer» B. extreme position | |
| 478. |
In scientific notation, numbers are expressed in________________? |
| A. | Power of ten |
| B. | Powers of two |
| C. | Reciprocal |
| D. | Decimal |
| Answer» B. Powers of two | |
| 479. |
In p-n-p transistor the collector current is________________? |
| A. | equal to emitter current |
| B. | slightly less than emitter current |
| C. | greater than emitter current |
| D. | any of above |
| Answer» C. greater than emitter current | |
| 480. |
In optic fiber transmission the repeater are separated through a distance of __________ km in newer system? |
| A. | 300km |
| B. | 200km |
| C. | 100km |
| D. | 20km |
| Answer» D. 20km | |
| 481. |
In optic fiber transmission system _____________ are used regenerate the dim light signal? |
| A. | Diodes |
| B. | Repeaters |
| C. | Laser |
| D. | Transformer |
| Answer» C. Laser | |
| 482. |
In open organ pipe___________________? |
| A. | only even harmonics are present |
| B. | only odd harmonics are present |
| C. | both even and odd harmonics are present |
| D. | selected harmonics are present |
| Answer» D. selected harmonics are present | |
| 483. |
In obtaining an X-ray photograph of our hand we use the principle of______________? |
| A. | photo electric effect |
| B. | ionization |
| C. | shadow photograph |
| D. | any of above |
| Answer» D. any of above | |
| 484. |
In normal state of energy the incident high energy photons will be______________? |
| A. | Stimulated |
| B. | Absorbed |
| C. | Cause X-ray emission |
| D. | Cause laser production |
| Answer» C. Cause X-ray emission | |
| 485. |
In n-p-n transistor, p works as______________? |
| A. | collector |
| B. | emitter |
| C. | base |
| D. | any of above |
| Answer» D. any of above | |
| 486. |
In multiplication and division of measurement______________? |
| A. | Percentage uncertainties are added |
| B. | Absolute uncertainties are added |
| C. | Percentage uncertainties are divided |
| D. | Absolute uncertainties are divided |
| Answer» B. Absolute uncertainties are added | |
| 487. |
In multimode step index fibre the refractive index of core and cladding is____________? |
| A. | same |
| B. | different |
| C. | zero |
| D. | different with refractive index of core higher than cladding |
| Answer» E. | |
| 488. |
In monochromatic red light a blue book will probably appear to be_________________? |
| A. | black |
| B. | purple |
| C. | green |
| D. | no scientific reasoning available |
| Answer» B. purple | |
| 489. |
In liquids and gases the current is due to the motion________________? |
| A. | negative charges |
| B. | positive charges |
| C. | both negative and positive charges |
| D. | neutral particles |
| Answer» D. neutral particles | |
| 490. |
In laser production the state in which more atoms are in the upper state than in the lower one is called_____________? |
| A. | Metal stable state |
| B. | Normal state |
| C. | Inverted population |
| D. | All the above |
| Answer» D. All the above | |
| 491. |
In hydrogen spectrum which one of the following series lies in the ultraviolet region ? |
| A. | Balmer series |
| B. | Pfund series |
| C. | Bracket series |
| D. | Lymann series |
| Answer» E. | |
| 492. |
In He-Ne laser the lasing action is produced by_______________? |
| A. | Ne only |
| B. | He-Ne both |
| C. | Electrons of He |
| D. | Electrons Ne |
| Answer» B. He-Ne both | |
| 493. |
In half-wave rectification the output D.C. voltages is obtained across the load for_______________? |
| A. | The negative half cycle of A.C. |
| B. | The positive half cycle of A.C. |
| C. | The positive and negative half cycles |
| D. | Either positive or negative half of A.C. |
| Answer» C. The positive and negative half cycles | |
| 494. |
In full wave rectification the output D.C. voltage across the load is obtained for_____________? |
| A. | The positive half cycle of input A.C. |
| B. | The negative half cycle of input A.C. |
| C. | The complete cycle of input A.C. |
| D. | All of the above. |
| Answer» D. All of the above. | |
| 495. |
In forward bias the width of potential barrier_____________? |
| A. | Increases |
| B. | Decreases |
| C. | Remains same |
| D. | No effect |
| Answer» C. Remains same | |
| 496. |
In double slit experiment we observe _____________________? |
| A. | interference fringes only |
| B. | diffraction fringes only |
| C. | both interference and diffraction fringes |
| D. | polirized frringes |
| Answer» D. polirized frringes | |
| 497. |
In double slit experiment if one of the two slit is covered then________________? |
| A. | no interference fringes are observed |
| B. | no diffraction fringes are observed |
| C. | no fringes observed |
| D. | interference pattern not disturbed |
| Answer» B. no diffraction fringes are observed | |
| 498. |
In Davisson-Germer experiment the diffracted proton from crystal shows______________? |
| A. | Particle property |
| B. | Wave property |
| C. | Light property |
| D. | Quantum property |
| Answer» C. Light property | |
| 499. |
In damped harmonic oscillation which one decreases ? |
| A. | Amplitude of vibration |
| B. | Energy of vibration |
| C. | Both amplitude and energy |
| D. | Neither amplitude nor energy |
| Answer» D. Neither amplitude nor energy | |
| 500. |
In cricket when a bowler produce reverse swing the ball will move towards______________? |
| A. | The shinning side of the ball |
| B. | Rough side |
| C. | The seam of the ball |
| D. | Goes straight |
| Answer» B. Rough side | |