24. Electric Force & Field; Gauss' Law

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?

When two objects are charged by friction or conduction, what type of particles flow between them to transfer $q$?

Which of the following forces acts only by combining $\mathrm{electric}$ and $\mathrm{magnetic}$ forces?

When inserting a plug into a wall receptacle, is it safe or unsafe to have your hand on the plug prongs while making contact with the outlet?

In the context of electric charge ($q$), resistance ($R$) to the flow of electrons produces which of the following?

Why does a wire that carries electric current become hot?

Why does a balloon stick to the wall after being rubbed on your hair?