24. Electric Force & Field; Gauss' Law

Which change increases the electric force between two charged objects according to $\mathrm{Coulomb}’s\mathrm{law}$?

Which of the following best describes the electrical charge of a neutron?

If three identical light bulbs, each with resistance $r$, are connected in series to a battery with emf $e$ and negligible internal resistance, what is the current flowing through the circuit?

Which electrical device allows current ($I$) to flow in only one direction?

In a cathode ray tube, why do $e-$ (electrons) move from the negative end (cathode) to the positive end (anode)?

Which type of force can be produced by an $\mathrm{electrical} \mathrm{current}$?

If a charged particle moves perpendicular to a uniform magnetic field and experiences a magnetic force of $3.5\times {10}^{-2}$ N, which of the following could be the value of the charge if the particle's velocity is $2.0\times {10}^6$ m/s and the magnetic field strength is $0.05$ T?

In an AC circuit with a resistor of resistance $R$ and a capacitor of capacitance $C$ connected in series to a voltage source $V=V_{0}sin\left(\omega t\right)$, what is the amplitude $i_0$ of the total current $i\left(t\right)$ in the circuit?

When two $\mathrm{negative}$ charges are brought close together, what type of interaction will occur between them?

When a person who is touching a Van de Graaff generator also touches the ground, what is the most likely outcome?

Which of the following statements about electric charge is true?

When no current flows in a conductor, free electrons move randomly, and their magnetic fields cancel. Which of the following best describes the motion of free electrons in this situation?

Which property of batteries allows them to power devices such as radios, watches, and cell phones?

In a simple electric circuit containing a battery, a resistor, and connecting wires, the electrons moving through the circuit in the attached figure will go through the resistor in which direction relative to the battery terminals?

To start a car engine, the car battery moves which of the following through the starter motor circuit?