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(D) $(1)$ Charging by conduction depends on the geometry and size of the bodies,not just half of the initial charge.$(2)$ Charge is invariant with vel

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Between two non-magnetic substances,repulsion is the true test of electrification (electrification means the body has a net charge).

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(D) $(1)$ Charging by conduction depends on the geometry and size of the bodies,not just half of the initial charge.$(2)$ Charge is invariant with velocity; it does not change as speed increases.$(3)$ Charge cannot exist without matter (mass).$(4)$ Repulsion is the true test of electrification because attraction can occur between a charged and an uncharged body due to induction,whereas repulsion only occurs between two like-charged bodies.

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