Hi folks.
A very famous and confusing question asked is-
what is the resistance of the ground- high or low and what is resistivity of the ground- high or low?
Answer = The resistance of the ground is very low and is of the order of 0.5 Ohms and less than 1 ohm. So resistance of the ground is very less. If we measure the resistivity of ground that highly depend on the type of soil, we find it in the order of 400-2000 OhmM. the conductors we use have resistivity in 10^-6 OhmM. The area of cross section of earth as conductor is the reason for very high resistivity and yet low resistance.
this low resistance help us to provide return path for fault currents and avoid the problems of arcing grounds. Thank you for your time and please feel free to leave comment.
A very famous and confusing question asked is-
what is the resistance of the ground- high or low and what is resistivity of the ground- high or low?
Answer = The resistance of the ground is very low and is of the order of 0.5 Ohms and less than 1 ohm. So resistance of the ground is very less. If we measure the resistivity of ground that highly depend on the type of soil, we find it in the order of 400-2000 OhmM. the conductors we use have resistivity in 10^-6 OhmM. The area of cross section of earth as conductor is the reason for very high resistivity and yet low resistance.
this low resistance help us to provide return path for fault currents and avoid the problems of arcing grounds. Thank you for your time and please feel free to leave comment.
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