A) ultrasonic rays
B) \[\gamma \]-waves
C) \[\alpha \]-ways
D) X-rays
Correct Answer: A
Solution :
It is clear that the cathode rays are the stream of magnetically charged particle called electron. These fast moving cathode rays when strike a metal target of high melting point with a very high velocity then ultrasonic rays are produced.You need to login to perform this action.
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