• Communication is transferring of information (message) from one point to another. 
  • To transfer the information to the receiver, medium of transmission is required.
  • Depending on the communication medium, the communication system is classified as wired and wireless communication system.
  • Wireless communication systems use radio waves, microwaves and infrared waves. 
  • Satellite communication and ground wave communication are common examples of wireless communications.
  • The wire communication system uses wire and optical fiber.
  • All forms of communication technologies demand the knowledge of physics

A. To listen sounds made by the heart, lungs or intestines, as well as blood flow in arteries and veins

B. To detect sound waves with frequency ranging from tens to thousands hertz

C. To detect the frequency of sound is higher than 20KHz

D. A  and B

A. Applications of physics to medical diagnosing and treating abnormal tissues

B. Technologies that are used to view the human body in order to diagnose monitor, or treat medical conditions

C. Absorption or emission of electromagnetic radiation by electron or atomic nuclei in response to application of certain magnetic fields.

D. The physical principle of magnetic resonance

A. x-ray creates 3D image and CT scan creates 2D images

B. x-ray more powerful than  CT Scan

C. CT Scan take a 360 degree image

D. CT Scan use a powerful magnet and radio waves

A. The knowledge of propagation of sound through water

B. The knowledge of turbulent flows, long range observation, and pattern recognition.

C. The knowledge of night and all-weather vision and techniques for avoiding detection

D. All are correct

A. Wireless communication systems use radio waves, microwaves and infrared waves. 

B. Satellite communication is common example of wireless communications.

C. The wireless communication system uses wire and optical fiber.

D. The wire communication system uses wire and optical fiber.

Answer 

1. D  2. B  3. C  4. D  5. C 

Last modified: Roobii, 24 Fulbaana 2025, 1:15 PM