An 800 KHz Radio Signal Is Detected at a Point

question 47

Multiple Choice

An 800 kHz radio signal is detected at a point 2.1 km distant from a transmitter tower.The electric field amplitude of the signal at that point is 800 mV/m.Assume that the signal power is radiated uniformly in all directions and that radio waves incident upon the ground are completely absorbed.The intensity of the radio signal at that point is closest to:

• A)8.5 × 10-4 W/m²
• B)1.2 × 10-3 W/m²
• C)1.7 × 10-3 W/m²
• D)6.0 × 10-4 W/m²
• E)4.2 × 10-4 W/m²

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Definitions:

Internal Rate

The Internal Rate of Return (IRR), a measure used to evaluate the profitability of potential investments.

Internal Rate

Often referred to as the Internal Rate of Return (IRR), it is the interest rate at which the net present value of all the cash flows (both positive and negative) from a project or investment equal zero.

Payback Method

A simplistic financial analysis tool used to determine the time required for the earnings from an investment to repay the initial investment cost.

NPV Profile

A graphical representation showing the relationship between the net present value (NPV) of a project and various discount rates, helping to analyze the investment's sensitivity to changes in cost of capital.