Q3. A radio signal has an output power of 10 milliwatts (mW). What is the power level in dBm?

A. 2.5 dBm

B. 25 dBm

C. 10 dBm

D. 250 dBm

**Correct Answer: C. 10 dBm**

**Explanation:**

To calculate power in dBm, use the formula:

dBm = 10 * log(P / 1 mW)

Substitute P = 10 mW into the formula:

dBm = 10 * log(25 / 1) = 10 * log(10) = 10 * 1 = 10dBm

So, the power level is 10 dBm.

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