What is the relationship between id and ic?
what is the relationship between and ?
the currents are not equal in magnitude, the algebraic signs of the current values are opposite.
the currents are equal in magnitude, the algebraic signs of the current values are the same.
the currents are equal in magnitude, the algebraic signs of the current values are opposite.
the currents are not equal in magnitude, the algebraic signs of the current values are the same.

The question has a diagram attached to it which I have done in the explanation.

The answer = The currents are equal in magnitude, the algebraic signs of the current values are opposite.

Explanation:

What is applied here is the Kirchoff's junction role or kirchoff's current law which states that the algebraic sum of the current entering any junction must be equal to the algebraic  sum of the current leaving the junction. this is what is applied in the diagram.

The attachment shows the explanation

An  atom  (ours, not carroll's) consists of a positively charged  nucleus, surrounded by one or more negatively charged particles called  electrons. the positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. most of an atom's mass is in its nucleus; the mass of an electron is only 1/1836 the mass of the lightest nucleus, that of hydrogen. although the nucleus is heavy, it is quite small compared with the overall size of an atom. the radius of a typical atom is around 0.1 to 0.25 nanometres (nm), whereas the radius of a nucleus is about 10-6  nm.  *  if an atom were enlarged to the size of the earth, its nucleus would be only 200 feet in diameter and could easily rest inside a small football stadium.read more on -