CH 22 Homework – Flashcards

The vast numbers of electrons in a coin don't fly off the surface because

The force that binds atoms together to form molecules is

Which of these does NOT have an electrical charge?

A positive ion has more

To say that electric charge is conserved means that no case has ever been found where

The unit of electric charge, the coulomb, is the charge on a

Two protons attract each other gravitationally and repel each other electrically. The stronger of these two forces is

Two charges that are separated by one meter exert 1-N forces on each other. If the charges are pushed together so the separation is 25 centimeters, the force on each charge will be

Superconductors are noted for their

Superconductors most often require

Two charged particles held close to each other are released. As they move, their speeds increase. Therefore, their charges have

If you comb your hair and the comb becomes positively charged, then your hair becomes

An uncharged pith ball is suspended by a nylon fiber. When a positively-charged rubber rod is brought nearby, the pith ball

A common naturally-polarized bit of matter is

Imagine a single charge q placed on one corner of a square, and that the electric field at the center of the square is F/q. If additional equal charges are placed on the other three corners, the electric field at the center of the square due to these four equal charges is 4F/q. F/(2q). F/q. F/(4q). none of the above

Electric charge distributes itself on conducting surfaces such that the electric field inside is zero. with greater concentration on more curved parts. both of the above none of the above

The electric field around an isolated electron has a certain strength 1 cm from the electron. The electric field strength 2 cm from the electron is four times as much. the same. half as much. twice as much. none of the above

Imagine a single charge q placed at one corner of a square, and that the electric field at the center of the square is F/q. If two other equal charges are placed at the adjacent corners of the square (leaving the opposite corner "blank"), the electric field at the center of the square is

Electric potential, measured in volts, is the ratio of electric energy to the amount of electric

The net charge on a charged capacitor depends on the distance between the capacitor plates. the area of the capacitor plates. the medium between the capacitor plates. all of the above none of the above

Electrostatics is a branch of electricity that focuses on

The fundamental force underlying all chemical reactions is

Which of these has the greatest mass?

To say that electric charge is conserved means that no case has ever been found where

To become a negative ion, an atom must

A main difference between gravitational and electric forces is that electrical forces

Two charged particles repel each other with a force F. If the charge of both particles is tripled and the distance between them is also tripled, then the force will be

Insulating materials are composed of atoms with

Charge carriers in a metal are electrons rather than protons because electrons are

The primary purpose of a lightning rod is to

A negatively-charged rod is held near an aluminum can that rests on a dry wood table. If you momentarily touch the opposite side of the can with your finger, the can becomes

Before a thunder storm, clouds in the sky likely become

To say that an object becomes electrically polarized means that

Electric shielding within a conductor is a consequence of

Imagine a single charge q placed on one corner of a square, and that the electric field at the center of the square is F/q. If additional equal charges are placed on the other three corners, the electric field at the center of the square due to these four equal charges is

Between a pair of equal and opposite charges, field lines are

A reason for electric shielding inside a conductor is that any free electrons inside would

An electron is pushed into an electric field where it acquires a 1-V electrical potential. If two electrons are pushed the same distance into the same electric field, the electrical potential of the two electrons is

Lillian safely touches a 100,000-volt Van de Graaff generator. Although the voltage is high, the relatively small amount of charge means a relatively small amount of