McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Uncategorized topics .
Chapters
| 351. |
Tensile stress is equal to |
| A. | Force per unit area |
| B. | Force per unit volume |
| C. | Extension per unit length |
| D. | Extension per unit area |
| Answer» A. Force per unit area | |
| 352. |
Dimensions of relative density are |
| A. | mass × length-3 |
| B. | mass × length3 |
| C. | It has no dimensions, since it's a ratio of two densities |
| D. | length 3 × mass -1 |
| Answer» C. It has no dimensions, since it's a ratio of two densities | |
| 353. |
Dimensions of gravitational constant ‘G’ are: {{}} |
| A. | [M]-1[L]3[T]-2 |
| B. | [M] [L]3[T]-2 |
| C. | [M]-1[L]2[T]-1 |
| D. | [M] [L]-1[T]2 |
| Answer» A. [M]-1[L]3[T]-2 | |
| 354. |
A person of mass ‘m’ kg jumps from a height of ‘h’ meters, he will land on the ground with a velocity equal to: |
| A. | √(2 × g × h |
| B. | 1/h × √(2 × g |
| C. | 2gh |
| D. | 2√(g × h |
| Answer» A. √(2 × g × h | |
| 355. |
In linear motion, the energy is given by 1⁄2mv 2. Similarly, in rotational motion, the rotational energy is given by {{}} |
| A. | 1/2 × I × ω; where I: moment of inertia of the body, ω: angular velocity |
| B. | 1/2 × I² × ω; where I: moment of inertia of the body, ω: angular velocity |
| C. | 1/2 × I × ω²; where I: moment of inertia of the body, ω: angular velocity |
| D. | 1/2 × I² × ω²; where I: moment of inertia of the body, ω: angular velocity |
| Answer» C. 1/2 × I × ω²; where I: moment of inertia of the body, ω: angular velocity | |
| 356. |
Boyle's law states that |
| A. | pressure of a gas is inversely proportional to its volume i.e. P × V = constant |
| B. | pressure of a gas is directly proportional to its volume i.e. P⁄V = constant |
| C. | pressure of a gas is inversely proportional to the square of its volume i.e. P × V² = constant |
| D. | pressure of a gas is directly proportional to the square of its volume i.e. P ⁄ V² = constant |
| Answer» A. pressure of a gas is inversely proportional to its volume i.e. P × V = constant | |
| 357. |
Isothermal bulk modulus is equal to |
| A. | Υ × P; where Υ: the ratio of the specific heat capacities of the gas, P: pressure |
| B. | Pressure |
| C. | The ratio of the specific heat capacities of the gas |
| D. | Υ ⁄ P; where Υ: the ratio of the specific heat capacities of the gas, P: pressure |
| Answer» B. Pressure | |
| 358. |
Adiabatic bulk modulus is equal to: |
| A. | Υ × P; where Υ: the ratio of the specific heat capacities of the gas, P: pressure |
| B. | Pressure |
| C. | The ratio of the specific heat capacities of the gas |
| D. | Υ ⁄ P; where Υ: the ratio of the specific heat capacities of the gas, P: pressure |
| Answer» A. Υ × P; where Υ: the ratio of the specific heat capacities of the gas, P: pressure | |
| 359. |
Bernoulli's principle shows that, at points in a moving fluid where the potential energy change is very small |
| A. | the pressure is low where the velocity is low and similarly, the pressure is high where the velocity is high |
| B. | the pressure is low where the velocity is high and conversely, the pressure is high where the velocity is low |
| C. | pressure becomes independent of the velocity of the moving fluid |
| D. | pressure remain independent of the speed of the stationary fluid |
| Answer» B. the pressure is low where the velocity is high and conversely, the pressure is high where the velocity is low | |
| 360. |
1 N (newton) is equal to {{}} |
| A. | 102 dynes |
| B. | 103 dynes |
| C. | 104 dynes |
| D. | 105 dynes |
| Answer» D. 105 dynes | |
| 361. |
Torricelli's theorem states that the velocity ‘v’ of the liquid emerging from the bottom of the wide tank is given by √(2gh). In practice, this velocity is: |
| A. | equal to √(2gh |
| B. | greater than √(2gh |
| C. | lesser than √(2gh |
| D. | independent of height and gravitational field strength |
| Answer» C. lesser than √(2gh | |
| 362. |
Dimensions of Young's modulus are {{}} |
| A. | [M]-1[L]-1[T]-2 |
| B. | [M]-1[L]-2[T]-2 |
| C. | [M] [L]-2[T]-2 |
| D. | [M] [L]-1[T]-2 |
| Answer» D. [M] [L]-1[T]-2 | |
| 363. |
Kepler's 3rd law states that... |
| A. | the periods of revolution of the planets are proportional to the cube of their mean distances from sun |
| B. | the periods of revolution of the planets are inversely proportional to the cube of their mean distances from sun |
| C. | the squares of the periods of revolution of the planets are proportional to the cube of their mean distance from sun |
| D. | the squares of the periods of revolution of the planets are inversely proportional to the cube of their mean distance from sun |
| Answer» C. the squares of the periods of revolution of the planets are proportional to the cube of their mean distance from sun | |
| 364. |
Gradual decrease in x-ray beam intensity as it passes through material is called |
| A. | attenuation |
| B. | decay |
| C. | radioactivity |
| D. | imaging |
| Answer» A. attenuation | |
| 365. |
Attenuation coefficient of bone is 600 m-1 for x-rays of energy 20 keV and intensity of beam of x-rays is 20 Wm-2, then intensity of beam after passingthrough a bone of 4mm is {{}} |
| A. | 3 Wm-2 |
| B. | 2.5 Wm-2 |
| C. | 2.0 Wm-2 |
| D. | 1.8 Wm-2 |
| Answer» D. 1.8 Wm-2 | |
| 366. |
For protons, the gyromagnetic ratio has the value {{}} |
| A. | 3 × 108rads-1 T-1 |
| B. | 2.68 × 108rads-1 T-1 |
| C. | 4 × 108rads-1 T-1 |
| D. | 5 × 108rads-1 T-1 |
| Answer» B. 2.68 × 108rads-1 T-1 | |
| 367. |
Energy passing through unit area is |
| A. | intensity of x-ray |
| B. | frequency of x-ray |
| C. | wavelength of x-ray |
| D. | amplitude of x-ray |
| Answer» A. intensity of x-ray | |
| 368. |
speed of ultrasound depends upon |
| A. | medium |
| B. | amplitude |
| C. | material |
| D. | wavelength |
| Answer» C. material | |
| 369. |
Bones look white in x-ray photograph because |
| A. | they are bad absorbers of x-rays |
| B. | they reflect x-rays |
| C. | they are good absorbers of x-rays |
| D. | they are bad absorbers of ultraviolet rays |
| Answer» C. they are good absorbers of x-rays | |
| 370. |
Larmor frequency depends upon the |
| A. | individual nucleus |
| B. | magnetic flux density |
| C. | both A and B |
| D. | energetic flux unit |
| Answer» C. both A and B | |
| 371. |
Acoustic impedance of human skin is {{}} |
| A. | 1.65 × 106 kg m2 s-1 |
| B. | 1.71 × 106 kg m-2 s-1 |
| C. | 2 × 10 6 kg m-2 s-1 |
| D. | 2 × 107 kg m-3 s-2 |
| Answer» B. 1.71 × 106 kg m-2 s-1 | |
| 372. |
In the best piezo-electric substances, the maximum value of strain is about |
| A. | 0.5 % |
| B. | 0.4 % |
| C. | 0.3 % |
| D. | 0.1 % |
| Answer» D. 0.1 % | |
| 373. |
With gel between skin and transducer percentage of reflected intensity of ultrasonic is |
| A. | 0.03% |
| B. | 0.05% |
| C. | 0.06% |
| D. | 0.08% |
| Answer» A. 0.03% | |
| 374. |
Attenuation coefficient depends on |
| A. | frequency of x-ray photons |
| B. | wavelength of x-ray photons |
| C. | energy of x-ray photons |
| D. | amplitude of x-ray photons |
| Answer» C. energy of x-ray photons | |
| 375. |
x-rays are filtered out of human body by using |
| A. | cadmium absorbers |
| B. | carbon absorbers |
| C. | copper absorbers |
| D. | aluminum absorbers |
| Answer» D. aluminum absorbers | |
| 376. |
Wavelength of x-rays is in range |
| A. | 10 -8 to 10 -13 m |
| B. | 10 -7 to 10 -14 m |
| C. | 10 -10 to 10 -15 m |
| D. | 10 2 to 10 9 m |
| Answer» A. 10 -8 to 10 -13 m | |
| 377. |
If fast moving electrons rapidly decelerate, then rays produced are |
| A. | alpha rays |
| B. | beta rays |
| C. | gamma rays |
| D. | x-rays |
| Answer» D. x-rays | |
| 378. |
As the x-rays pass through matter, it's intensity |
| A. | increases |
| B. | decreases |
| C. | remains constant |
| D. | may increase or decrease depending on the object |
| Answer» B. decreases | |
| 379. |
X-rays have |
| A. | short wavelength |
| B. | high frequency |
| C. | both A and B |
| D. | longest wavelength |
| Answer» C. both A and B | |
| 380. |
Acoustic impedance is defined as |
| A. | ρ⁄c |
| B. | ρc |
| C. | c⁄ρ |
| D. | ρ+c |
| Answer» B. ρc | |
| 381. |
A sound wave which has frequency higher than the upper limit of human hearing is |
| A. | infra sonic |
| B. | ultrasonic |
| C. | supersonic |
| D. | megasonic |
| Answer» B. ultrasonic | |
| 382. |
Fatty tissues have |
| A. | relaxation time of several seconds |
| B. | relaxation time of several hundred nanoseconds |
| C. | intermediate relaxation times |
| D. | relaxation times of several hundred milliseconds |
| Answer» D. relaxation times of several hundred milliseconds | |
| 383. |
Angular frequency of precision is called |
| A. | Lower frequency |
| B. | higher frequency |
| C. | Larmor frequency |
| D. | linear frequency |
| Answer» C. Larmor frequency | |
| 384. |
Scattered x-ray beams approach the detector screen |
| A. | perpendicularly |
| B. | parallel |
| C. | anti-parallel |
| D. | at an angle |
| Answer» D. at an angle | |
| 385. |
Maximum energy an x-ray photon can have is {{}} |
| A. | e⁄V |
| B. | e |
| C. | eV |
| D. | V |
| Answer» C. eV | |
| 386. |
Soft x-rays have |
| A. | high energies |
| B. | low energies |
| C. | lowest frequency |
| D. | longest wavelength |
| Answer» B. low energies | |
| 387. |
Intensity of x-rays can be increased by increasing |
| A. | frequency |
| B. | current |
| C. | voltage |
| D. | resistance |
| Answer» B. current | |
| 388. |
Bone thickness is equal to {{}} |
| A. | cΔt/2 |
| B. | cΔt |
| C. | c/t |
| D. | t/2 |
| Answer» A. cΔt/2 | |
| 389. |
Hardness of x-ray beam can be increased by increasing |
| A. | voltage |
| B. | current |
| C. | frequency |
| D. | wavelength |
| Answer» A. voltage | |
| 390. |
In x-ray production, the kinetic energy of an electron arriving at anode is |
| A. | 100 keV |
| B. | 200 keV |
| C. | 300 keV |
| D. | 400 keV |
| Answer» B. 200 keV | |
| 391. |
Change in speed of ultrasound causes |
| A. | reflection |
| B. | diffraction |
| C. | refraction |
| D. | image |
| Answer» C. refraction | |
| 392. |
Type of x-rays used to detect break in bone is |
| A. | hard |
| B. | soft |
| C. | both A and B |
| D. | moderate |
| Answer» A. hard | |
| 393. |
Wavelength of 2.0 MHz ultrasound waves in tissue is |
| A. | 7.5 × 10-4 m |
| B. | 8 × 10-5 m |
| C. | 8.5 × 10-6 m |
| D. | 9.2 × 10-3 m |
| Answer» A. 7.5 × 10-4 m | |
| 394. |
Intensifier screens reduces the patient's exposure to x-rays by a factor of |
| A. | 500-600 |
| B. | 1000-2000 |
| C. | 100-500 |
| D. | 10-100 |
| Answer» C. 100-500 | |
| 395. |
Contrast media consist of elements with |
| A. | lower atomic number |
| B. | higher atomic number |
| C. | metalloids |
| D. | inert gases |
| Answer» B. higher atomic number | |
| 396. |
Thickness of material which decreases intensity of x-ray material to half of original value is |
| A. | quarter thickness |
| B. | half thickness |
| C. | half life |
| D. | 2 times of thickness |
| Answer» B. half thickness | |
| 397. |
A good x-ray source should produce x-rays of narrow beam and |
| A. | parallel x-rays |
| B. | perpendicular x-rays |
| C. | anti-parallel x-rays |
| D. | anti-perpendicular x-rays |
| Answer» A. parallel x-rays | |
| 398. |
Speed of Earth when a rock of mass 60 kg falling towards Earth with speed of 20 m s-1 is {{}} |
| A. | 2.4 × 10-22 m s-1 |
| B. | 3.5 × 10-33 m s-1 |
| C. | −2.0 × 10-22 m s-1 |
| D. | −3 × 1034 m s-1 |
| Answer» C. −2.0 × 10-22 m s-1 | |
| 399. |
Force exerted by bat on ball if it strikes a ball of mass 0.16 kg initially hits bat with speed of 25 m s-1 with time impact of 0.003 s is {{}} |
| A. | 145 N |
| B. | 1333.33 N |
| C. | 1456.7 N |
| D. | 6543 N |
| Answer» B. 1333.33 N | |
| 400. |
Momentum of electron having mass 9.1 × 10 -31 kg and velocity 2.0 ×107 is {{}} |
| A. | 1.91 × 10-23 |
| B. | 2.34 × 10-23 |
| C. | 3.11 × 10-19 |
| D. | 7.88 × 10-34 |
| Answer» A. 1.91 × 10-23 | |
Done Studing? Take A Test.
Great job completing your study session! Now it's time to put your knowledge to the test. Challenge yourself, see how much you've learned, and identify areas for improvement. Don’t worry, this is all part of the journey to mastery. Ready for the next step? Take a quiz to solidify what you've just studied.