CSS Solved Papers
Physics Chemistry

Entry Test MCQ :: Alternating Current

  Electromagnetic waves travel in free space with the speed of
[A]. ?-rays[B]. Positive rays
[C]. Cathode rays[D]. More than sound waves

Answer: Option A

Rao said:    
option A is False

ahmad said:    
yes,because option A is also electromagnetic waves having high frequency and low wavelegth

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