24. Electric Force & Field; Gauss' Law

Which type of force results from the interaction of $\mathrm{charged}$ particles?

Four identical point charges, each of charge $q$, are placed at the corners of a square of side $a$. What is the magnitude of the net electric force on one of the charges due to the other three?

An ohm is equal to which of the following combinations of SI base units?

If a wire carries a current of $10.0 fA$ (femtoamperes), how many electrons per second flow through the wire? (Elementary charge $e=1.60\times 10{-}^{19}C$)

In the rectangle shown in the drawing, where should a positive point charge be placed so that the electric field at the center of the rectangle is $0$?

Which type of circuit is described as a noncontinuous loop that prevents the flow of current?

Suppose two point charges, $q$ and $-q$, are placed a distance $d$ apart. What is the direction of the electric field at the midpoint between the charges?

A charged particle moves through a region and does not experience any magnetic force. Which of the following could explain this observation?

In the context of electric circuits, what is the primary quantity that flows through a circuit to produce electric current ($I$)?

Which of these materials is an insulator?

Which of the following symbols represents a DC voltage source in a circuit schematic?

Which of the following best explains whether an object can be charged negatively using a positively charged object?

Which of the following configurations would produce an $\mathrm{electric} \mathrm{current}$?

Which of the following statements regarding electric insulators is correct?

A conducting sphere with a diameter of $4.00cm$ is charged so that its electric potential is $50V$ relative to infinity. What is the total charge on the sphere? (Assume the sphere is isolated in air, and use $\epsilon 0_0$ for the permittivity of free space.)