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11/01/2024
A mobile phone sends and receives messages through the following
A) Sound waves
B) Radio waves
C) X-waves
D) Light wave
Which wave is used for sending signals to satellite from ground station is
A) Radio wave
B) Infrared wave
C) Micro wave
D) Light wave
To find the hidden secrets under the water, the ships and submarines use the
A) Radiation system
B) Sonar system
C) X-ray system
D) Radiation system
Recording of brain waves from outer surface of head is called
A) MRI
B) C.T. scan
C) E.E.G
D) E.C.G
15/10/2022
15/10/2022
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