Radio Amateur Quiz Canadian License

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Question B-005-004-006

Calculate the value of resistance necessary to drop 100 volts with current flow of 0.8 milliamperes:

Correct Answer

125 kilohms

Explanation

First convert mA to A: 0.8 mA = 0.0008 A. Ohm's Law: R = E / I. R = 100 V / 0.0008 A = 125,000 Ω = 125 kΩ.

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