24. Electric Force & Field; Gauss' Law

In an electric motor, the rotating coil of wires wrapped around an iron core is a(n):

Given a segment $b$ in a circuit where a total charge of $6C$ passes through in $2s$, what is the magnitude of the current $ib$ in segment $b$?

Which symbol and unit of measurement are used for electric current?

Suppose two point charges, $q_1$ and $q_2$, are placed a distance apart, and charge $a$ is positive. What is the direction of the electric force on charge $a$ due to a nearby negative charge $b$?

Which of the following is the correct unit for measuring resistance?

Which of the following statements about electrical resistance is correct?

When a charged insulator is placed near an uncharged metallic object, which of the following best describes what happens to the metallic object?

Which of the following is the SI unit used to measure electric current?

Given the following pairs of particles, which interaction will result in an attractive electrical force? (A) Particle 1: $+2e$, Particle 2: $+3e$; (B) Particle 1: $-1e$, Particle 2: $-4e$; (C) Particle 1: $+2e$, Particle 2: $-3e$; (D) Particle 1: $+1e$, Particle 2: $+1e$

If the current in a conductor is increased from $0$ to its maximum value in $\frac{1}{4}$ of the time it takes to reach maximum current, what fraction of the maximum charge has passed through the conductor during this interval?

If you connect two identical batteries, each with voltage $V$, which arrangement will provide a higher total voltage: connecting them in series or in parallel?

When electrons move from one object to another by direct contact, which process is occurring?

Which of the following provides protection from electric shock when you touch a live wire?

Which of the following configurations will cause a light bulb to light up when connected to a battery and wires? ($A$) The bulb is connected in series with the battery, forming a closed loop. ($B$) The bulb is connected to only one terminal of the battery. ($C$) The bulb is connected in parallel with the battery, forming a closed loop. ($D$) The bulb is connected to both terminals of the battery, but the circuit is open (one wire is disconnected).

Why do electric charges build up on clothing in an electric dryer?