Question

Electric current passing through a human body can be dangerous, even fatal, depending on the amount of current, the duration of the current, and the region of the body through which the current passes. However, currents less than about 0.5 mA are typically imperceptible. A current caused by a low potential difference typically travels through the outer layer of the skin. The resistance of the skin therefore determines how much current flows for a given potential difference. The resistance can be influenced by a number of factors, including whether the skin is wet For example, suppose an electric current of 80.5 A follows a path through the thumb and index finger. When the skin is dry, the resistance along this path is 4.10 x 10' . What voltage (in V) is required for this current, in the case of dry skin? What is Ohm's law? How does it relate current, potential difference, and resistance? V When the skin is wet, the resistance is lowered to 2,300. What voltage (in Vis required for the same current in the case of wet skin? 0.204 V Compare this to the electrical current associated with electrons in the atoms that make up your body. In the Bohr model of the hydrogen atom, an electron in the sth excited state moves at a speed of 8.76 x 10 's in a circular path having a radius of 1.32 x 10m What is the effective current associated with this orbiting electron? Tour T omiso by mu pie of ben. A electrons, calculate the average current in A) in the lightning bolt Lastly, compare this to a typical lightning bolt which may last for 0.177 5 and transfer 1.07 10 were the prop er the average curre n t The

Answer 1

solution ₃ 36.285 1- According to ohm's lawz V = I R = 88.5x10-6 x 410 xlor v = 361285 V 1 360285 7 The other answer of this question is not Possible why they say it incorrect? 2- Too 204 | 3- Time period of revolution = T= 379 OR T = 2x3.141.32x10-9 8.76 8104 (sec.) = 0.94630137 X10-13 (sec.) So current = I = L = 1.6X16319_ A 0.94630137 X10-13 OR I = 1.6908x10-6 A 1.6908x10-6A It u already correct. 4-