Physics Quiz 5.1

If 10 J of work is used in pushing 1 C of charge into an electric field, its electric potential relative to its starting position us

10 V

In an electrically neutral atom the number of protons in the nucleus is equal to the number of

Electrons that surround the nucleus

An electrically charged atom is an

Ion

When the distance between two charges is halved, the electrical force between them

Is reduced by 1/4

To say that an object becomes electrically polarized means that

Its charges have been rearranged

A fundamental rule of electricity is that

Like kinds of charge repel and unlike kinds of charge attract

Conducting materials are composed of atoms with

Loose outer electrons

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

Repel or attract

A semiconductor can be

A conductor and/or an insulator

The electrical force on a 2-c charge is 60 N. The electric field where the charge is located is

30 N/C

Superconductors are noted for their

Absence of electric resistance

An electron and a proton

Attract each other

Electrostatics is a branch of electricity that focuses on

Both electrical forces and charges

Electric potential is the ratio of electric energy to the amount of electric

Charge

If you rub an inflated balloon against your hair and place the balloon against the wall it will stick to the wall, showing

Charge polarization

The electrical force between charges is strongest when the charges are

Close together

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

Directed from positive to negative, more concentrated closer to the charges, and vectors with patterns that stem from the inverse square law

The force that binds atoms together to form molecules is

Electrical

Just as gravity is the study of a wide range of gravitational interactions, electricity is the study of a wide range of

Electrical interactions

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

Energy transfer

Electrons can be transferred from one place to another by the process of

Friction, contact, and induction

To become a negative ion, an atom must

Gain an electron

Electric potential energy is measured in joules. Electric potential, on the other hand, is measured

In volts

Rub electrons from your hair with a comb and the comb becomes

Negatively charged

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

Net charge has been created or destroyed

Which of these does not have an electrical charge

Neutron

A positive ion has more

Protons than electrons

Although the energy per coulomb of a high voltage party balloon is high, the energy transfer that occurs if you touch it is low due to

The relatively small amount of charge

Insulating materials are composed of atoms with

Tightly bound outer electrons

When a car is struck by lightning, the resulting electric field inside the car is

Zero