The depth of penetration at 4 MHz is 10 cm, then at 2.5 MHz it is – McqOptions

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1.	The depth of penetration at 4 MHz is 10 cm, then at 2.5 MHz it is
A.	62.5 cm
B.	13 cm
C.	6.25 cm
D.	8 cm
Answer» C. 6.25 cm

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