Which of the follow has no effect on the strength of the magnetic field around a current-carrying coil of wire? a. the number of turns of a wire in the coil b. the thickness of the wire c. current flowing through the coil d. the material of the core placed in the coil

Two point charges are on the y axis. a 3.90-µc charge is located at y = 1.25 cm, and a -2.4-µc charge is located at y = −1.80 cm. (a) find the total electric potential at the origin. v (b) find the total electric potential at the point whose coordinates are (1.50 cm, 0). v