24. Electric Force & Field; Gauss' Law

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?

Why are metals good conductors of electrical current ($I$)?

Three identical point charges $q$ are placed at three corners of a square of side $l$. What is the magnitude of the net electrostatic force experienced by the charge at the empty corner due to the other three charges?

A plastic rod is charged to $-12nc$ by rubbing. Which of the following statements is correct about the charge on the rod?

Four point charges are placed at the corners of a square of side $l$. Each corner has a charge: two adjacent corners have charge $q$ (both positive), and the other two have charge $-q$ (both negative). What is the magnitude of the net electric force on one of the positive charges due to the other three charges?

Which of the following is the primary cause of deviation error in a magnetic compass?

What is the main advantage of using a circuit breaker instead of a fuse in an electrical circuit?

Which of the following statements about electric charge is true?

In the context of electric charge, which of the following forces can be either attractive or repulsive?

Which statement best compares the function of a brush and a commutator in an electric motor?