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.
| 501. |
In Compton scattering, the change in wavelength is maxed if_______________? |
| A. | The angle of scattering is 90° |
| B. | The angle of scattering is 60° |
| C. | The angle of scattering is 180° |
| D. | The angle of scattering is 0 |
| Answer» D. The angle of scattering is 0 | |
| 502. |
In case of planets the necessary acceleration is provided by______________? |
| A. | Gravitational force |
| B. | Frictional force |
| C. | Coulomb force |
| D. | Centripetal force |
| Answer» B. Frictional force | |
| 503. |
In case of a simple pendulum, the cause of damping is__________________? |
| A. | Drag force of air |
| B. | Gravity |
| C. | Tension in the string |
| D. | None of these |
| Answer» B. Gravity | |
| 504. |
In any measurement the significant figures are______________? |
| A. | All accurately known and all doubtful digits |
| B. | Only accurately known digits |
| C. | Only doubtful digits |
| D. | All accurately known digits and the first doubtful digit |
| Answer» E. | |
| 505. |
In an X-ray tube electrons each of charge e are accelerated through V potential difference allowed to hit a metal target. The wavelength of the X-rays emitted is_______________? |
| A. | he/ev |
| B. | he/Vc |
| C. | eV/h |
| D. | impossible to predict |
| Answer» B. he/Vc | |
| 506. |
In an interference pattern______________________? |
| A. | bright fringes are wider than dark fringes |
| B. | dark fringes are wider than bright fringe |
| C. | both dark and bright fringes are of equal width |
| D. | central fringes are brighter than the outer fringes |
| Answer» D. central fringes are brighter than the outer fringes | |
| 507. |
In an electronic transition atom cannot emit______________? |
| A. | γ-rays |
| B. | Infra red radiation |
| C. | Visible light |
| D. | Ultraviolet rays |
| Answer» B. Infra red radiation | |
| 508. |
In an electron microscope, we use energetic particles because of______________? |
| A. | Penetrating power is high |
| B. | Kinetic energy is large |
| C. | Wavelength is very short |
| D. | All the above reasons |
| Answer» D. All the above reasons | |
| 509. |
In an angular motion, Newton’s second law of motion is_____________? |
| A. | F=ma |
| B. | F=τp/It |
| C. | Στ = I α |
| D. | All above |
| Answer» D. All above | |
| 510. |
In a semiconductors the charge carriers are ___________________? |
| A. | Holes only |
| B. | Electrons only |
| C. | Electron and holes both |
| D. | All of the above |
| Answer» D. All of the above | |
| 511. |
In a plane polarized light _________________? |
| A. | vibration in all direction |
| B. | vibration in two mutually perpendicular directions |
| C. | vibration take place in a direction perpendicular to the direction of propagation of light |
| D. | no vibration at all |
| Answer» D. no vibration at all | |
| 512. |
In a photoelectric effect monochromatic light is incident on a metal surface. If the incident light of twice the intensity but of same wavelength the kinetic energy of the emitted electron_______________? |
| A. | Becomes double |
| B. | Remains same |
| C. | Becomes half |
| D. | First increases then decrease because of the curvilinear graph |
| Answer» C. Becomes half | |
| 513. |
In a multi range ammeter as the range increases _____________________? |
| A. | shunt value decreases |
| B. | shunt value increases |
| C. | shunt value remains the same |
| D. | none of the above |
| Answer» B. shunt value increases | |
| 514. |
In a half-wave rectifier the r.m.s. value of the A.C. component of the wave is________________? |
| A. | Equal to D.C. value |
| B. | More than D.C. value |
| C. | Less than D.C. value |
| D. | Zero |
| Answer» C. Less than D.C. value | |
| 515. |
In a clinical thermometer the mercury in the capillary tube does not contract once removed from the patient because_______________? |
| A. | Mercury takes a long time to contract |
| B. | The amount of mercury use is very small |
| C. | The capillary tube has a small constriction near the bulb |
| D. | The capillary tube is very narrow |
| Answer» D. The capillary tube is very narrow | |
| 516. |
Image of an object 5 mm high is only 1 cm high. Magnification produced by lens is__________________? |
| A. | 0.5 |
| B. | 0.2 |
| C. | 1 |
| D. | 2 |
| Answer» E. | |
| 517. |
If we whirl a stone at the end of a string in the vertical circle, it is likely to break when the stone is________________? |
| A. | At the highest point |
| B. | At the lowest point |
| C. | At any point during motion |
| D. | At the point where gravity is not acting |
| Answer» C. At any point during motion | |
| 518. |
If velocity is doubled then__________________? |
| A. | momentum increases 4 times and K.E increases 2 times |
| B. | momentum and K.E. remain same |
| C. | momentum increases 2 times and K.E increases constant |
| D. | momentum increases 2 times and K.E increases 4 time |
| Answer» E. | |
| 519. |
If the wavelength of incident radiation is increased in photoemission then_________________? |
| A. | The maximum kinetic energy of the photoelectrons increases |
| B. | The minimum kinetic energy of the photoelectrons decreases |
| C. | The minimum kinetic energy of the photoelectrons increases |
| D. | The average kinetic energy of the photoelectrons decreases |
| Answer» E. | |
| 520. |
If the volume of a gas is held constant and we increase its temperature then_______________? |
| A. | its pressure is constant |
| B. | its pressure rises |
| C. | its pressure falls |
| D. | any of above |
| Answer» C. its pressure falls | |
| 521. |
If the pressure of a given gas is held constant its density is inversely proportional to its absolute temperature. We can refer it as another statement of______________? |
| A. | Boyles law |
| B. | Charles law |
| C. | Ideal gas law |
| D. | Avagadros law |
| Answer» C. Ideal gas law | |
| 522. |
If the plane of the rectangular coil is parallel to the magnetic field (i.e radial magnetic field) the torque on the coil is_____________________? |
| A. | τ = NIAB cosφ |
| B. | τ = NIAB sinφ |
| C. | τ = NIAB tanφ |
| D. | τ = NIAB |
| Answer» E. | |
| 523. |
If the length of the second pendulum becomes four times, then its time period will become________________? |
| A. | 4 times |
| B. | 6 times |
| C. | 8 times |
| D. | 2 times |
| Answer» E. | |
| 524. |
If the density of atoms remain same along any direction in a crystal is called__________________? |
| A. | Symmetry |
| B. | Homogeneity |
| C. | Isotropy |
| D. | Cleavage |
| Answer» C. Isotropy | |
| 525. |
If stretching force T of wire increases, then its frequency __________________? |
| A. | decreases |
| B. | increases |
| C. | remains the same |
| D. | any of above |
| Answer» C. remains the same | |
| 526. |
If one or more of the neutrons emitted during fission cab be used to build up further fission then the reaction is self-sustained and is known as __________________? |
| A. | Fission reaction |
| B. | Fusion reaction |
| C. | Chain reaction |
| D. | Chemical reaction |
| Answer» D. Chemical reaction | |
| 527. |
If n number of the photon is striking on a metal surface then total momentum exerted is_______________? |
| A. | p |
| B. | n |
| C. | 0 |
| D. | None |
| Answer» B. n | |
| 528. |
If moon radius is 1600 km and g on its surface is 1.6 ms-2 then the escape velocity on the moon is ___________________? |
| A. | 1600 ms-1 |
| B. | 50.6 ms-1 |
| C. | 71.6 ms-1 |
| D. | 2263ms-1 |
| Answer» C. 71.6 ms-1 | |
| 529. |
If east, west, north, south, up and down are representing the direction of unit vectors, then east x south has the direction along_____________? |
| A. | West |
| B. | North |
| C. | Down |
| D. | Up |
| Answer» D. Up | |
| 530. |
If capacitance of L-C circuit is made four times then frequency of the circuit becomes___________________? |
| A. | Twice |
| B. | One half |
| C. | Four times |
| D. | None |
| Answer» C. Four times | |
| 531. |
If an object is placed away from 2f of a converging lens then the image will be_______________? |
| A. | real and erect |
| B. | virtual and erect |
| C. | real and inverted |
| D. | virtual |
| Answer» D. virtual | |
| 532. |
If A=B, which of the following is not correct ? |
| A. | A.B = A^ B^ |
| B. | |A| = |B| |
| C. | |A^| = |B^| |
| D. | AB^ = BA^ |
| Answer» B. |A| = |B| | |
| 533. |
If A=Ax i^ + Ay j^ + Az K^ B = Bx i^ + By j^ + Bz K^ then______________? |
| A. | A. B = Ax Bx + Ay By + Az Bz |
| B. | A. B = Ax By + Ay Bz + Az By |
| C. | A. B = Ay Bz + Az By + Az Bx |
| D. | A. B = Ax Bz + Ay By + Az Bx |
| Answer» B. A. B = Ax By + Ay Bz + Az By | |
| 534. |
If a wheel of radius r turns through an angle of 30° then the distance through which any point on its rim moves is______________? |
| A. | π /3 x r |
| B. | π/6 x r |
| C. | V/30 x r |
| D. | π / 180 x r |
| Answer» C. V/30 x r | |
| 535. |
If a photon is reflected from the mirror then the change in momentum of each photon is_______________? |
| A. | Zero |
| B. | Double |
| C. | Half |
| D. | 1 |
| Answer» C. Half | |
| 536. |
If a material object moves with speed of light its mass becomes ________________? |
| A. | equal to its rest mass |
| B. | double of its rest mass |
| C. | infinite |
| D. | zero |
| Answer» D. zero | |
| 537. |
If a glass plate is inserted in between the plate of a capacitor in series with a lighted bulb the brightness of the bulb________________? |
| A. | Remains same |
| B. | Brightness increases |
| C. | Brightness decreases |
| D. | No light |
| Answer» C. Brightness decreases | |
| 538. |
If a diffraction grating is placed in the path of a light beam it reveals______________? |
| A. | Wave property |
| B. | Particle property |
| C. | Energy particle |
| D. | Electromagnetic wave property |
| Answer» B. Particle property | |
| 539. |
If a current carrying solenoid is suspended freely it will__________________? |
| A. | be rotating |
| B. | come to rest in N-S direction |
| C. | vibrating like galvanometer needle |
| D. | comes to rest after rotation |
| Answer» C. vibrating like galvanometer needle | |
| 540. |
If a convex lens of large aperture fails to converge the light rays incident on it to a single point, it is said to suffer from______________? |
| A. | chromatic aberration |
| B. | spherical aberration |
| C. | both spherical and chromatic |
| D. | distortion |
| Answer» C. both spherical and chromatic | |
| 541. |
If a car moves with a uniform speed of 2 ms-1 in a circle of radius 0.4. Its angular speed is______________? |
| A. | 4 rad. S-1 |
| B. | 5 rad. S-1 |
| C. | 1.6 rad. S-1 |
| D. | 2.8 ms-1 |
| Answer» C. 1.6 rad. S-1 | |
| 542. |
If a body of mass 10 kg is allowed to fall freely, its weight becomes______________? |
| A. | 0 |
| B. | 89N |
| C. | 9.8 N |
| D. | 10N |
| Answer» B. 89N | |
| 543. |
If a body a mass of 2 kg is raised vertically through 2m, then the work done will be _________________? |
| A. | 38.2 J |
| B. | 392.1 J |
| C. | 39.2 J |
| D. | 3.92 J |
| Answer» D. 3.92 J | |
| 544. |
If 1 ampere current flows through 2m long conductor the charge flow through it in 1 hour will be_______________? |
| A. | 3600C |
| B. | 7200C |
| C. | 1C |
| D. | 2C |
| Answer» B. 7200C | |
| 545. |
Identify the correct statement about minority carriers_____________? |
| A. | holes in n-type and free electrons in p-type |
| B. | holes in n-type and p-type |
| C. | free electrons in n-type and holes in p-type |
| D. | free electrons in n-type and p-type |
| Answer» B. holes in n-type and p-type | |
| 546. |
Ideal fluid is_______________? |
| A. | Non-viscous |
| B. | Incompressible |
| C. | Steady flow |
| D. | Possess all properties |
| Answer» E. | |
| 547. |
I ^. (j^ x k^) is equal to______________? |
| A. | 1 |
| B. | i^ |
| C. | j^ |
| D. | k^ |
| Answer» B. i^ | |
| 548. |
Hydrogen atom does not emit X-rays because _________________? |
| A. | its energy levels are too close to each other |
| B. | its energy levels are too far apart |
| C. | it is too small in size |
| D. | it has a single electron |
| Answer» E. | |
| 549. |
How much heat does a 40 W bulb generates in one hour ? |
| A. | 144000J |
| B. | 144J |
| C. | 1.44J |
| D. | 14J |
| Answer» B. 144J | |
| 550. |
How many types of units are in SI ? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |