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The Depth of penetration of EM wave in medium having conductivity σ at a frequency of 1 MHz is 25 cm. The depth of penetration at a frequency of 4 MHz will be | |
A. | 6.25 cm [Wrong Answer] |
B. | 12.50 cm [Correct Answer] |
C. | 50 cm [Wrong Answer] |
D. | 100 cm [Wrong Answer] |