MCQOPTIONS
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MCQOPTIONS
This section includes 778 Mcqs, each offering curated multiple-choice questions to sharpen your Physics Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 601. |
The most useful tracer is_________________? |
| A. | Sr-90 |
| B. | I-131 |
| C. | CA-41 |
| D. | C-14 |
| Answer» E. | |
| 602. |
Which one of the following possesses greater penetration power ? |
| A. | α-rays |
| B. | β-rays |
| C. | γ-rays |
| D. | Neutron-rays |
| Answer» E. | |
| 603. |
Why gamma rays are used to kill bacteria to sterilize surgical equipment etc ? |
| A. | Chargeless |
| B. | Massless |
| C. | Highly penetrating |
| D. | All of above |
| Answer» D. All of above | |
| 604. |
X-rays are electromagnetic waves like________________? |
| A. | Light waves |
| B. | Heat waves |
| C. | Microwaves |
| D. | γ-rays |
| Answer» E. | |
| 605. |
The charge on beta particle is________________? |
| A. | 1 |
| B. | -1 |
| C. | +2 |
| D. | -2 |
| Answer» B. -1 | |
| 606. |
T.V sets and microwave ovens emit ___________________? |
| A. | X-rays |
| B. | α-rays |
| C. | β-rays |
| D. | γ-rays |
| Answer» B. α-rays | |
| 607. |
Strontium-90 is used as __________________? |
| A. | α-particle source |
| B. | β-particle source |
| C. | γ-rays source |
| D. | Neutron source |
| Answer» B. β-particle source | |
| 608. |
During the fission process a large amount of______________? |
| A. | Heat energy is released |
| B. | Nuclear energy is released |
| C. | Chemical energy is released |
| D. | Light energy is released |
| Answer» C. Chemical energy is released | |
| 609. |
The penetration power of alpha particle as compared to beta particle is_______________? |
| A. | 10 times more |
| B. | 100 times more |
| C. | 100 times less |
| D. | 10 times less |
| Answer» C. 100 times less | |
| 610. |
An alpha particle in a single encounter__________________? |
| A. | Loses a small fraction of its energy |
| B. | Losses most of its energy |
| C. | Loses no energy at all |
| D. | Loses all of its energy |
| Answer» C. Loses no energy at all | |
| 611. |
Pair production takes place in the vicinity of a heavy nucleus so that_____________? |
| A. | Net energy is conserved |
| B. | Net charge is conserved |
| C. | Net momentum is conserved |
| D. | All of the above |
| Answer» E. | |
| 612. |
Ina liquid metal fast breeder reactor, the type of uranium used is______________? |
| A. | 92U235 |
| B. | 92U238 |
| C. | 92U234 |
| D. | 92U239 |
| Answer» C. 92U234 | |
| 613. |
The unit of radioactivity curie is equal to_________________? |
| A. | 3.74 x 109 disintegration per sec |
| B. | 3.70 x 1010 disintegration per sec |
| C. | 3.55 x 1010 disintegration per sec |
| D. | 3.60 x 1010 disintegration per sec |
| Answer» C. 3.55 x 1010 disintegration per sec | |
| 614. |
The unit of radioactivity curie is equal to________________? |
| A. | 3.74 x 109 disintegration per sec |
| B. | 3.70 x 1010 disintegration per sec |
| C. | 3.55 x 1010 disintegration per sec |
| D. | 3.60 x 1010 disintegration per sec |
| Answer» C. 3.55 x 1010 disintegration per sec | |
| 615. |
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 | |
| 616. |
Radioactive materials can be identified by measuring their_______________? |
| A. | Hardness |
| B. | Density |
| C. | Mass |
| D. | Half life |
| Answer» E. | |
| 617. |
The energy liberated when one atom of U-235 undergoes fission reaction is________________? |
| A. | 200MeV |
| B. | 40MeV |
| C. | 30MeV |
| D. | 20MeV |
| Answer» B. 40MeV | |
| 618. |
Mass of neutron is________________? |
| A. | 1.67 x 10-31 kg |
| B. | 1.67 x 10-27 kg |
| C. | 9.1 x 10-31 kg |
| D. | 1.67 x 10-19 kg |
| Answer» C. 9.1 x 10-31 kg | |
| 619. |
A mass spectrograph (spectrometer) sorts out____________? |
| A. | Molecules |
| B. | Ions |
| C. | Elements |
| D. | Isotopes |
| Answer» D. Isotopes | |
| 620. |
Electrons_________________? |
| A. | Can exist inside the nucleus |
| B. | Cannot exist inside the nucleus |
| C. | Can exist both inside and outside the nucleus |
| D. | Do not know |
| Answer» E. | |
| 621. |
For chain reaction to build up the size of the radioactive target should be______________? |
| A. | Greater than the critical size |
| B. | Less than the critical size |
| C. | Equal to the critical size |
| D. | All of above can build up a change reaction |
| Answer» B. Less than the critical size | |
| 622. |
Mass defect per nucleon is ___________________? |
| A. | The binding energy of the nucleus |
| B. | Packing fraction |
| C. | The average energy of the nucleus |
| D. | All of above are one and the same thing |
| Answer» C. The average energy of the nucleus | |
| 623. |
Nuclear forces exist between ___________________? |
| A. | Proton-proton |
| B. | Proton-neutron |
| C. | Neutron-neutron |
| D. | All of the above |
| Answer» E. | |
| 624. |
Transuranic elements have an atomic number_______________? |
| A. | Greater than 72 |
| B. | Greater than 82 |
| C. | Greater than 92 |
| D. | Greater than 102 |
| Answer» D. Greater than 102 | |
| 625. |
Antimatter consists of ______________? |
| A. | Antiproton |
| B. | Antineutron |
| C. | Positron |
| D. | All of above |
| Answer» E. | |
| 626. |
The diameter of an atom is approximately_______________? |
| A. | 10-12m |
| B. | 10-11m |
| C. | 10-10m |
| D. | 10-14m |
| Answer» D. 10-14m | |
| 627. |
The magnitude of the cross product is equal to the dot product between them. The angle between the two vectors is________________? |
| A. | 30° |
| B. | 45° |
| C. | 60° |
| D. | 180° |
| Answer» C. 60° | |
| 628. |
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 | |
| 629. |
A transmitting station emits radio waves of wavelength λ at power P. If h is Planck’s constant & c the speed of light what is the rate of emission of photons ? |
| A. | λ |
| B. | Speed of sound |
| C. | Speed of lightB. |
| D. | h |
| Answer» D. h | |
| 630. |
Which one is a unit vector ? |
| A. | ??3 i^ + ??3 j^ + ??3 k^ |
| B. | 1/??3 i^ + 1/??3 j^ +1/ ??3 k^ |
| C. | ??3 / 3 i^ + ??3 / 3 j^ + ??3 / 3 k^ |
| D. | Both B and C are correct |
| Answer» E. | |
| 631. |
An angle between two vectors A and B can be determined by_____________? |
| A. | Their dot product |
| B. | Their cross product |
| C. | Head to tail rule |
| D. | Right-hand rule |
| Answer» B. Their cross product | |
| 632. |
Null vector is a vector which has________________? |
| A. | Zero magnitude |
| B. | No specified direction |
| C. | Both A and B are correct |
| D. | Both A and B are not correct |
| Answer» D. Both A and B are not correct | |
| 633. |
The dimension of torque is______________? |
| A. | [ML2T-2] |
| B. | [MLT-2] |
| C. | [ML2T] |
| D. | [ML-2T-2] |
| Answer» B. [MLT-2] | |
| 634. |
Torque is defined as______________? |
| A. | Turning effect of force |
| B. | Cross product of position vector and force |
| C. | Product of force and moment arm |
| D. | All A, B and C are correct |
| Answer» E. | |
| 635. |
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 | |
| 636. |
SI unit of torque is______________? |
| A. | N.m |
| B. | joule |
| C. | Both a and b are correct |
| D. | Neither a nor b is correct |
| Answer» B. joule | |
| 637. |
A three-dimensional image is obtained by________________? |
| A. | Electron microscope |
| B. | Scanning electron microscope |
| C. | Magnetic imaging |
| D. | None of the above |
| Answer» C. Magnetic imaging | |
| 638. |
After traveling through a vacuum a photon of light entering into some transparent denser medium. Thus the energy of light______________? |
| A. | Increases because wavelength decreases |
| B. | Decreases because speed decreases |
| C. | Remains same |
| D. | Increases then decrease |
| Answer» D. Increases then decrease | |
| 639. |
A lens which converges a beam of parallel rays to a point is called______________? |
| A. | diverging (or concave) lens |
| B. | converging (or convex) lens |
| C. | plano concave lens |
| D. | plano convex lens |
| Answer» C. plano concave lens | |
| 640. |
Materials in which valence electrons are tightly bound to their atoms at low temperature are called___________________? |
| A. | Semi conductor |
| B. | Super conductors |
| C. | Insulators |
| D. | Conductor |
| Answer» D. Conductor | |
| 641. |
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| | |
| 642. |
Two vectors are A = 3i^+2j^ -k^& B = 3i^-2j^ +k^ , then_____________? |
| A. | B is anti-parallel to A |
| B. | B is a negative vector of A |
| C. | B has a negative magnitude |
| D. | B is perpendicular to A |
| Answer» C. B has a negative magnitude | |
| 643. |
Electron moves in the orbit as________________? |
| A. | Simple vibratory motion |
| B. | Standing wave motion |
| C. | Vibratory motion like up and down |
| D. | S.H.M likes the sound |
| Answer» C. Vibratory motion like up and down | |
| 644. |
Compton effect proves the________________? |
| A. | Photon theory of light |
| B. | Dual nature of light |
| C. | Wave nature of light |
| D. | Uncertain nature of light |
| Answer» B. Dual nature of light | |
| 645. |
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 | |
| 646. |
The power of a concave lens is_______________? |
| A. | real |
| B. | virtual |
| C. | positive |
| D. | negative |
| Answer» E. | |
| 647. |
Unit of power of a lens is________________? |
| A. | meter |
| B. | watt |
| C. | diopter |
| D. | horsepower |
| Answer» D. horsepower | |
| 648. |
The diameter of a lens is called________________? |
| A. | focal length |
| B. | principal axis |
| C. | aperture |
| D. | radius of curvature |
| Answer» C. aperture | |
| 649. |
The rectangular coordinate system is also called______________? |
| A. | Polar coordinate system |
| B. | Cartesian coordinate system |
| C. | Cylindrical coordinate system |
| D. | Spherical coordinate system |
| Answer» C. Cylindrical coordinate system | |
| 650. |
Unit vector n^ is along______________? |
| A. | X-axis |
| B. | Normal on a surface |
| C. | Y-axis |
| D. | Z-axis |
| Answer» C. Y-axis | |