If we are saying that electrostatic field is conserved we do not mean that
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Explanation: Electric field
An electrostatic field exists in the region surrounding an electrically charged object. This charged object, when brought in close proximity to an uncharged object, can induce a charge on the formerly neutral object. This is known as an induced charge. Quantitatively, this induced charge is the voltage gradient between two points at different potentials (Matisoff, 1986). In most situations, it is the electric field from the charge which causes electrostatic effects.
One technique for evaluating the possible sparking hazard is therefore to measure the electric field intensity (V/m) at the surface of the charged fabric (Owens, 1984). It has been demonstrated that field intensities less than 5 kV/cm cannot ignite any fuel that has a minimum ignition energy (MIE) greater than 0.15 mJ (Rizvi and Smy, 1992).