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