24. Electric Force & Field; Gauss' Law

Two parallel metal disks of radius $R$ are separated by a distance $d$ in vacuum and carry equal and opposite charges $Q$. What is the maximum potential difference that can be established between the disks before electrical breakdown of air occurs, given the breakdown electric field strength is $E_{\max }$?

An object has $4$ positive charges and $2$ negative charges. What is its total charge?

The negative or positive pole of an electric current is referred to as the _____.

Which of the following devices uses $\mathrm{electric} \mathrm{current}$ as part of its normal operation?

How does one $1 C$ (coulomb) of charge compare to the charge of a single electron ($\left|e\right|$)?

A thin rod of length $l$ carries a total charge $q$ distributed uniformly along its length. What is the linear charge density $\lambda$ of the rod?

Two point charges are separated by a distance of $25.0\mathrm{cm}$. If each charge has a magnitude of $2.0\times {10}^{-6}C$, what is the magnitude of the electrostatic force between them? (Assume vacuum, $k=8.99\times {10}^{9}N{m}^2{C}^{-2}$)

When a point charge is released from rest in a region containing a uniform $E$ field, what will be the motion of the charge?

If a point charge in an electric field is replaced by a charge of $+0.4\mu C$, how does the force experienced by the charge change compared to the original force experienced by a $+1.0\mu C$ charge at the same location?

A collection of $1.875\times {10}^{19}$ electrons has the charge of which of the following values?

Two point charges, a positive charge $+q$ and a negative charge $-Q$, are placed on a straight line with a point (the dot) between them. If the electric field at the dot is zero, what is the value of the negative charge $-Q$ in terms of $q$ and the distances $a$ (from $+q$ to the dot) and $b$ (from $-Q$ to the dot)?

Which property makes a metal a good material to use for electrical wires?

In the context of electric charge and current, the length of time that current is flowing is known as:

Why do metals often make good conductors of electric charge $q$?