A Level Physics MCQs: Multiple Choice Questions and Answers (Quiz & Tests with Answer Keys) by Arshad Iqbal

Author:Arshad Iqbal
Language: eng
Format: epub
Tags: accelerated motion multiple choice questions and answers, advance level physics multiple choice questions and answers, capacitance multiple choice questions and answers, electric current multiple choice questions and answers, electric field multiple choice questions and answers, electromagnetic induction multiple choice questions and answers, electromagnetism multiple choice questions and answers, magnetic field multiple choice questions and answers, potential difference multiple choice questions and answers, resistance multiple choice questions and answers
Publisher: Bushra Arshad

Chapter 20

Medical Imaging MCQs

MCQ 1: Gradual decrease in x-ray beam intensity as it passes through material is called

A. attenuation

B. decay

C. radioactivity

D. imaging

MCQ 2: 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 passing through a bone of 4mm is

A. 3 Wm-2

B. 2.5 Wm-2

C. 2.0 Wm-2

D. 1.8 Wm-2

MCQ 3: For protons, the gyromagnetic ratio has the value

A. 3 × 108 rads-1 T-1

B. 2.68 × 108 rads-1 T-1

C. 4 × 108 rads-1 T-1

D. 5 × 108 rads-1 T-1

MCQ 4: 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

MCQ 5: speed of ultrasound depends upon

A. medium

B. amplitude

C. material

D. wavelength

MCQ 6: 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

MCQ 7: Larmor frequency depends upon the

A. individual nucleus

B. magnetic flux density

C. both A and B

D. energetic flux unit

MCQ 8: 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 × 106 kg m-2 s-1

D. 2 × 107 kg m-3 s-2

MCQ 9: 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 %

MCQ 10: 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%

MCQ 11: 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

MCQ 12: x-rays are filtered out of human body by using

A. cadmium absorbers

B. carbon absorbers

C. copper absorbers

D. aluminum absorbers

MCQ 13: 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. 102 to 109 m

MCQ 14: If fast moving electrons rapidly decelerate, then rays produced are

A. alpha rays

B. beta rays

C. gamma rays

D. x-rays

MCQ 15: 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

MCQ 16: X-rays have

A. short wavelength

B. high frequency

C. both A and B

D. longest wavelength

MCQ 17: Acoustic impedance is defined as

A. ρ⁄c

B. ρc

C. c⁄ρ

D. ρ+c

MCQ 18: A sound wave which has frequency higher than the upper limit of human hearing is

A. infra sonic

B. ultrasonic

C. supersonic

D. megasonic

MCQ 19: 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

MCQ 20: Angular frequency of precision is called

A. Lower frequency

B. higher frequency

C. Larmor frequency

D. linear frequency

MCQ 21: Scattered x-ray beams approach the detector screen

A. perpendicularly

B. parallel

C. anti-parallel

D. at an angle

MCQ 22: Maximum energy an x-ray photon can have is

A. e⁄V

B. e

C. eV

D. V

MCQ 23: Soft x-rays have

A. high energies

B. low energies

C. lowest frequency

D. longest wavelength

MCQ 24: Intensity of x-rays can be increased by increasing

A. frequency

B. current

C. voltage

D. resistance

MCQ 25: Bone thickness is equal to

A. cΔt/2

B. cΔt

C. c/t

D. t/2

MCQ 26: Hardness of x-ray beam can be increased by increasing

A. voltage

B. current

C. frequency

D. wavelength

MCQ 27: In x-ray production, the kinetic energy of an electron arriving at anode is

A.

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