24. Electric Force & Field; Gauss' Law

Two point charges, $q_1$ and $q_2$, are placed on the x-axis at positions $x_1$ and $x_2$ respectively. What is the expression for the electric force exerted on $q_1$ by $q_2$?

Which of the following best describes a Faraday cage?

Which physical quantity does a $galvanometer$ measure?

A noncontact ammeter is used to measure the current flowing through a circuit. If the ammeter reads $2.0 A$, what is the current in the circuit?

Which statement best describes the difference between a conductor and an insulator in terms of $electrons$?

Three identical light bulbs $A$, $B$, and $C$ are connected in a circuit as shown: bulbs $A$ and $B$ are connected in parallel, and this combination is connected in series with bulb $C$ to a battery. Rank the bulbs from brightest to dimmest.

Which of the following statements correctly compares the behavior of bulbs in $\mathrm{series}$ and $\mathrm{parallel}$ circuits when one bulb burns out?

In an electric circuit, what is the conventional direction of electric current with respect to the movement of electric charge carriers?

Which type of electric current is typically supplied to homes for general use?

Which of the following best defines an electric current?

A wire loop of radius $10cm$ and resistance $R$ is placed in a uniform magnetic field perpendicular to the plane of the loop. If the magnetic field changes at a constant rate, what is the magnitude of the induced current in the loop?

What is static electricity caused by?

A positive point charge moves to the right with velocity $v$ in a region where the magnetic field $B$ points into the page. What is the direction of the magnetic force acting on the charge?

If a voltage $vc\left(t\right)=10\cos \left(2000\pi t\right)$ volts is applied across a $10\mu F$ capacitor, what is the expression for the charge $q\left(t\right)$ on the capacitor as a function of time?

What is the electric field at the origin due to a point charge of $-12 nC$ located at $(x,y)$ = $(1.0 \mathrm{cm},0 \mathrm{cm})$?