Power Resistance

Power Resistance
If the internal resistance of the power supply is 1800 Ω, which is the current through the human body?

A person with body resistance between the Hands of 12kΩ accidentally reaches the terminals of a 13-kV power supply. a) Is the resistance of the power supply is 1800 Ω, which is the current through the body of man? b) What is the power disappeared into his body? C) If the power supply is to be made safe by increasing the internal resistance, what is the internal resistance for the maximum current in the above situation, I (max) = 1.00 mA or less?

_____________________ Internal resistance of the power supply = r = 1800 Ω Body Resistance between the hands = R = 12kΩ = 12000 Ω = E = 13 kV power supply = 13000 V. The current through the human body = i = E / (R + r) power through the body of man-i-13000 / 13800 (a) The current through the human body = i = 0.9420 A _____________ (b) The power dissipated in his body = i ^ 2R = 10,649.02 W ___________________________ When Imax = 1.00 mA = 0.001 AR + r = E / E r = Imax / Imax – 13000/0.001 R = r – 12000 r = 13000000 -12000 = 12988000 (c) The internal resistance should be12988000 ohms for the maximum current in the above situation I will be (Max) = 1.00 mA or less, the internal resistance be1.2988000 * 10 should ^ 7 ohms or 12.988 Mega Ohm ______________________________

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