Question 1

Angular frequency of precision is called

Accepted Answer

A) Lower frequency 
B) higher frequency 
C) Larmor frequency 
D) linear frequency 
A) Lower frequency 
B) higher frequency 
C) Larmor frequency 
D) linear frequency C

Question 2

Fatty tissues have

Accepted Answer

A) relaxation time of several seconds 
B) relaxation time of several hundred nanoseconds 
C) intermediate relaxation times 
D) relaxation times of several hundred milliseconds 
A) relaxation time of several seconds 
B) relaxation time of several hundred nanoseconds 
C) intermediate relaxation times 
D) relaxation times of several hundred milliseconds D

Question 3

Hardness of x-ray beam can be increased by increasing

Accepted Answer

A) voltage 
B) current 
C) frequency 
D) wavelength 
A) voltage 
B) current 
C) frequency 
D) wavelength A

Question 4

As the x-rays pass through matter, it's intensity

Accepted Answer

A) increases 
B) decreases 
C) remains constant 
D) may increase or decrease depending on the object 
A) increases 
B) decreases 
C) remains constant 
D) may increase or decrease depending on the object

Question 5

Scattered x-ray beams approach the detector screen

Accepted Answer

A) perpendicularly 
B) parallel 
C) anti-parallel 
D) at an angle 
A) perpendicularly 
B) parallel 
C) anti-parallel 
D) at an angle

Question 6

Soft x-rays have

Accepted Answer

A) high energies 
B) low energies 
C) lowest frequency 
D) longest wavelength 
A) high energies 
B) low energies 
C) lowest frequency 
D) longest wavelength

Question 7

Acoustic impedance is defined as

Accepted Answer

A) ρ⁄c 
B) ρc 
C) c⁄ρ 
D) ρ+c 
A) ρ⁄c 
B) ρc 
C) c⁄ρ 
D) ρ+c

Question 8

A good x-ray source should produce x-rays of narrow beam and

Accepted Answer

A) parallel x-rays 
B) perpendicular x-rays 
C) anti-parallel x-rays 
D) anti-perpendicular x-rays 
A) parallel x-rays 
B) perpendicular x-rays 
C) anti-parallel x-rays 
D) anti-perpendicular x-rays

Question 9

If fast moving electrons rapidly decelerate, then rays produced are

Accepted Answer

A) alpha rays 
B) beta rays 
C) gamma rays 
D) x-rays 
A) alpha rays 
B) beta rays 
C) gamma rays 
D) x-rays

Question 10

Contrast media consist of elements with

Accepted Answer

A) lower atomic number 
B) higher atomic number 
C) metalloids 
D) inert gases 
A) lower atomic number 
B) higher atomic number 
C) metalloids 
D) inert gases

Question 11

A sound wave which has frequency higher than the upper limit of human hearing is

Accepted Answer

A) infra sonic 
B) ultrasonic 
C) supersonic 
D) megasonic 
A) infra sonic 
B) ultrasonic 
C) supersonic 
D) megasonic

Question 12

In x-ray production, the kinetic energy of an electron arriving at anode is

Accepted Answer

A) 100 keV 
B) 200 keV 
C) 300 keV 
D) 400 keV 
A) 100 keV 
B) 200 keV 
C) 300 keV 
D) 400 keV

Question 13

Wavelength of 2.0 MHz ultrasound waves in tissue is

Accepted Answer

A) 7.5 × 10-4m 
B) 8 × 10-5 m 
C) 8.5 × 10-6 m 
D) 9.2 × 10-3m 
A) 7.5 × 10-4m 
B) 8 × 10-5 m 
C) 8.5 × 10-6 m 
D) 9.2 × 10-3m

Question 14

Maximum energy an x-ray photon can have is {{}}

Accepted Answer

A) e⁄V 
B) e 
C) eV 
D) V 
A) e⁄V 
B) e 
C) eV 
D) V

Question 15

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 {{}}

Accepted Answer

A) 145 N 
B) 1333.33 N 
C) 1456.7 N 
D) 6543 N 
A) 145 N 
B) 1333.33 N 
C) 1456.7 N 
D) 6543 N

Question 16

Change in speed of ultrasound causes

Accepted Answer

A) reflection 
B) diffraction 
C) refraction 
D) image 
A) reflection 
B) diffraction 
C) refraction 
D) image

Question 17

Intensity of x-rays can be increased by increasing

Accepted Answer

A) frequency 
B) current 
C) voltage 
D) resistance 
A) frequency 
B) current 
C) voltage 
D) resistance

Question 18

Bone thickness is equal to {{}}

Accepted Answer

A) cΔt/2 
B) cΔt 
C) c/t 
D) t/2 
A) cΔt/2 
B) cΔt 
C) c/t 
D) t/2

Question 19

Thickness of material which decreases intensity of x-ray material to half of original value is

Accepted Answer

A) quarter thickness 
B) half thickness 
C) half life 
D) 2 times of thickness 
A) quarter thickness 
B) half thickness 
C) half life 
D) 2 times of thickness

Question 20

Momentum of electron having mass 9.1 × 10-31 kg and velocity 2.0 ×107 is {{}}

Accepted Answer

A) 1.91 × 10-23 
B) 2.34 × 10-23 
C) 3.11 × 10-19 
D) 7.88 × 10-34 
A) 1.91 × 10-23 
B) 2.34 × 10-23 
C) 3.11 × 10-19 
D) 7.88 × 10-34

Exam 16: Physics Topics: X-Rays, Ultrasound, Momentum, Force, and Energy

Angular frequency of precision is called

Fatty tissues have

Hardness of x-ray beam can be increased by increasing

As the x-rays pass through matter, it's intensity

Scattered x-ray beams approach the detector screen

Soft x-rays have

Acoustic impedance is defined as

A good x-ray source should produce x-rays of narrow beam and

If fast moving electrons rapidly decelerate, then rays produced are

Contrast media consist of elements with

A sound wave which has frequency higher than the upper limit of human hearing is

In x-ray production, the kinetic energy of an electron arriving at anode is

Wavelength of 2.0 MHz ultrasound waves in tissue is

Maximum energy an x-ray photon can have is {{}}

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 {{}}

Change in speed of ultrasound causes

Intensity of x-rays can be increased by increasing

Bone thickness is equal to {{}}

Thickness of material which decreases intensity of x-ray material to half of original value is

Momentum of electron having mass 9.1 × 10-31 kg and velocity 2.0 ×107 is {{}}

Physics Force, Acceleration, and Projectile Motion

Electrical and Physics Concepts

Physics Pressure, Energy, and Waves

Physics Capacitance, Magnetic Fields, and Circular Motion

Physics and Communication

Electrical and Digital Concepts and Terminology

Electricity and Magnetism

Magnetism and Electromagnetism

Magnetism, Op-Amps, and Sensing Devices

Physics Forces, Moments, and Gravitational Fields

Satellites, Gravitational Fields, and Gases

Electrical Circuit and Current

Pressure, Hookes Law, Forces and Springs, Elasticity, Stress and Strain

Physics Concepts and Formulas

Physics Dimensions

Momentum and Collisions

Physics Forces, Acceleration, and Units

Physics Terminology

Principles of Oscillatory Motion and Related Measurements

Physics and Measurement

Physics and Waves: Exploring Phenomena, Unification, and Detection

Physics and Nuclear Science

Radiation and Nuclear Science Basics

Understanding Electrical Properties and Phenomena

Energy and Temperature

Energy, Work, and Power

Filters

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 {{}}

Momentum of electron having mass 9.1 × 10^-31 kg and velocity 2.0 ×107 is {{}}