Question: a. The power level at 10 meters is 100 mW. At 20 meters, it is 5 mW. How many decibels has it lost? 11a.) Which

a. The power level at 10 meters is 100 mW. At 20 meters, it is 5 mW. How many decibels has it lost?

11a.) Which is the correct formula for decibels?

a. 10 × P2/P1

b. 10 × (P2/P1)2

c. Log10(P2/P1)

d. None of the above


b. Compared to an omni-directional antenna, a dish antenna quadruples radiated power. How much is this change in decibels?

11b.) Compared to an omni-directional antenna, a dish antenna quadruples radiated power. How much is this change in decibels?


c. Compute the decibel value for a power ratio of 17:1.

d. Of 1:33.

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