voltage potential at the earth mat increases due to earthing
voltage potential at the earth mat decreases due to earthing
voltage potential at the earth mat remains zero irrespective of fault
none of the above
to provide as low resistance possible to the ground
to provide as high resistance possible to the ground
to provide flow of positive, negative and zero sequence currents
increases
decreases
does not effects
depth of the electrode
moisture
NaCl
all the above
To protect the equipment from excess current
To maintain the line current constant
To maintain the supply voltage constant
To increase the life of the equipments