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1. |
The Depth of penetration of EM wave in medium having conductivity 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 |
B. | 12.50 cm |
C. | 50 cm |
D. | 100 cm |
Answer» C. 50 cm | |