Consider an uncharged, conducting hollow spherical shell. The electric field on the inside surface of the spherical shell is measured to be directed toward the inner shell wall and varies in magnitude over the spherical shell's inside surface. It is known that the only charge in the hollow cavity inside the spherical shell is a point charge with magnitude q. What is the sign of the charge q?

The sign of charge q is negative.

Explanation:

This is because electric field lines usually emanate from positive charges and terminate at negative charges. The negative charge in the hollow cavity induces a positive charge on the inner shell wall of the hollow shell which in turn induces the negative charge q on the hollow spherical shell.

Since the induced electric charge on the inner wall is positive, the electric field lines from that charge terminates at the inner charge q. Since electric field lines terminate only at negative charges, q is negative.

answer; (arch); good luck

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force