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1. |
A transmitting antenna radiates 251 watt isotropically. A receiving antenna locating 100 m away from the transmitting antenna has an effective aperture of 500 cm2. The total received power by the antenna is |
A. | 10 W |
B. | 20 W |
C. | 1 W |
D. | 100 W |
Answer» E. | |