24. Electric Force & Field; Gauss' Law

In a circuit containing two batteries with emfs $𝑛=12 V$ and $𝑛=6 V$ connected in series with a resistor of $4 \Omega$, what is the total charge that flows through the resistor after the circuit is closed for $10 s$?

In an electric circuit, which of the following quantities is equal to the sum of the individual values for all components connected in series?

When the switch in the circuit in (figure 1) has been open for a long time and is then closed at $t=0$, what is the initial current through the resistor immediately after closing the switch?

In a circuit diagram, which symbol is commonly used to represent an electric charge?

Which of the following best describes how electricity is generated using photovoltaic cells?

In a Wheatstone bridge circuit used to measure electric charge, if resistors $r_1$, $r_2$, $r_3$, and $r_4$ are arranged in the bridge and the voltmeter reads zero when $r_3$ is adjusted, which relationship gives the value of $r_3$ in terms of the other resistances?

If the charge on the first sphere is one-quarter the charge of the second sphere, which of the following correctly expresses the charge $q_1$ on the first sphere in terms of the charge $q_2$ on the second sphere?

Which of the following conditions must be true for $electrons$ to move in a $conductor$?

What is the term for the basic unit of electric current? The basic unit of electric current is the:

In the context of electric circuits, the term "load" refers to the amount of $R$ in a circuit branch.

Which of the following statements regarding lightning strikes is correct?

Which of the following best explains how an object becomes negatively charged?${-}^{\mathrm{charge}}$

Which of the following best describes conventional current in the context of electric charge?

In order to accurately measure the electric current flowing through a component, how should an ammeter be connected to a circuit?

An insulating sphere of radius $a$, centered at the origin, has a uniform volume charge density $\rho$. What is the total charge contained within the sphere?