Which statement correctly describes these electric field lines?

a.
both sources are positively charged.
b.
both sources are negatively charged.
c.
source a is negatively charged and source b is positively charged.
d.
source a is positively charged and source b is negatively charged.

A.  Both sources are positively charged.

Explanation:

Before answering, let's remind what is the direction of the electric field lines for a positive charge and a negative charge. Keeping in mind that the direction of the field lines is given by the direction of motion of a positive test charged place in that electric field, we have:

- For a positive charge, field lines point away from the charge (because a positive test charge will move away from the source of the field)

- For a negative charge, field lines point towards the charge (because a negative test charged will move towards the source of the field)

In this example, we see that field lines point away from both charges A and B. therefore, both sources are positively charged.

increasing transnational kinetic energy. because the transnational kinetic energy formula consists of only two variables, mass and velocity, increasing one of those properties is the only way to increase an object's transnational kinetic energy. increases to mass and velocity, however, do not have the same impact.