If you touch the two terminals of a power supply with your two fingertips on opposite hands,

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If you touch the two terminals of a power supply with your two fingertips on opposite hands, the potential difference will produce a current through your torso. The maximum safe current is approximately \(5 \mathrm{~mA}\).

a. If your hands are completely dry, the resistance of your body from fingertip to fingertip is approximately \(500 \mathrm{k} \Omega\). If you accidentally touch both terminals of your \(120 \mathrm{~V}\) household electricity supply with dry fingers, will you receive a dangerous shock?

b. If your hands are moist, your resistance drops to approximately \(1 \mathrm{k} \Omega\). If you accidentally touch both terminals of your \(120 \mathrm{~V}\) household supply with moist fingers, will you receive a dangerous shock?

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College Physics A Strategic Approach

ISBN: 9780321907240

3rd Edition

Authors: Randall D. Knight, Brian Jones, Stuart Field

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