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Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples

This is the number of complete movements of a wave per second.

Acoil suspended freely, points in some direction when no current is passed through it . can you tell what will happen when a current is passed though it?