How is lightning current formed on lightning rods when lightning is interpreted?
In fact, it is not the loop that has the current. I think the exact answer is that a loop is necessary to maintain a constant current. The clouds with the electricity is static, a capacitor is formed between the clouds and the earth, when the electric field between clouds and the earth is strong enough, the middle of the air will be the charge from the breakdown of ionization, ionization channels and flow away, ionization channel equivalent wire. Since it does not constitute a loop, the discharge process can only be instantaneous.
Because the charged cloud has accumulated a strong potential difference between the charge and the earth a lot, the air breakdown, the air layer at the moment into a conductor, so the clouds - air layer -- the human body -- the earth to form a return circuit.
Lightning is the clouds and the earth or the clouds and clouds of different charge different, thus formed the capacitance effect, when the middle air breakdown discharge will produce a strong current, the formation of lightning hit people with high voltage and large current through the body, the equivalent capacitance discharge, people can not afford such a high current and voltage in millions v.
