1. Una carga de 12 uc se encuentra en el centro de una esfera metálica electrizada. El radio de la esfera es de 30 cm, calcula:
a) La intensidad del campo eléctrico en la superficie de la esfera.
b) La intensidad del campo eléctrico a 15 cm de la superficie de la esfera.
c) La intensidad del campo eléctrico a un metro de la superficie de la esfera.​

Apositive rod is placed to the left of sphere a, and the spheres are separated. which best describes the spheres? sphere a is negative and sphere b is positive because protons from sphere a are attracted to the rod and move to sphere b. sphere a is negative and sphere b is positive because electrons from sphere b are attracted to the rod and move to sphere a. sphere a is positive and sphere b is negative because electrons from the rod move to sphere b and protons then move to sphere a. sphere a is positive and sphere b is negative because protons move from sphere b to the rod and also to sphere a.

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative

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