24. Electric Force & Field; Gauss' Law

When a power source supplies a prescribed voltage and is used to power a light bulb, which quantity describes the amount of electric charge passing through the bulb per unit time?

A point charge of magnitude $q$ is placed at the center of a cube with sides of length $l$. What is the electric flux through one face of the cube?

In a circuit with an ammeter connected, which change would cause the needle on the ammeter to point to the left of the zero, indicating a reversal in the direction of electric current?

Given that the figure (Figure 1) shows the voltage and current graphs for an inductor, which of the following statements is correct about the phase relationship between voltage and current in an ideal inductor?

An electromagnet can be made by wrapping wire around which type of object?

In a circuit with two identical light bulbs, $A$ and $B$, connected in series to a battery, what happens to the brightness of bulb $A$ if bulb $B$ is removed from the circuit (leaving only bulb $A$ connected to the battery)?

Two small spheres spaced $20.0$ centimeters apart have equal charge. If the force between them is measured to be $2.0\times 10{\mathrm{-6}}^2$ newtons, what is the magnitude of the charge on each sphere? (Assume the spheres are in vacuum and use $k=8.99\times 109^9$ N·m$2^{-}$/C$2^2$.)

Which of the following correctly describes the electric force between an $e-$ (electron) and a $p+$ (proton), and between two $e-$ (electrons)?

An electric current is defined as the flow of what through a conductor?

A large lightning bolt had a current of $\mathrm{20,000} A$ and moved a charge of $30.0 C$. What was the duration of the lightning bolt?

A spherical shell contains three charged objects with charges $q_1$, $q_2$, and $q_3$. What is the total electric flux through the surface of the shell according to Gauss's law?

Which unit is used to measure $R$ (resistance)?

Suppose an electric field exerts a westward force on an electron. In which direction is the $E$ field at the location of the electron?

Which of the following is the SI unit of electric current?

Which of the following is an advantage of using a noncontact voltage detector compared to a voltmeter when testing for the presence of electric charge in a wire?