Section 4 Flashcards
The force that binds atoms together to form molecules is
electrical.
The fundamental force underlying all chemical reactions is
electrical.
A fundamental rule of electricity is that: a) like kinds of charges repel; b) unlike kinds of charges attract; c) both of these; d) neither of these.
c) both of these.
An electron and a proton: a) attract each other; b) repel each other; c) neither attract nor repel each other.
a) attract each other.
In an electrically neutral atom the number of protons in the nucleus is equal to the number of
electrons that surround the nucleus.
Which of these does NOT have an electrical charge: a) proton; b) electron; c) neutron.
c) neutron.
It is said that electric charge is quantized, which means that the charge on an object: a) may occur in an infinite variety of quantities; b) is a whole-number multiple of the charge on one electron; c) will interact with neighboring electric charges; d) can be neither created nor destroyed; e) is sometimes positive.
b) is a whole-number multiple of the charge on one electron.
To say that electric charge is conserved means that no case has ever been found where
net charge has been created or destroyed.
To become a negative ion, an atom must
gain an electron.
If electrons are stripped from an atom it becomes a
positive ion.
A main difference between gravitational and electric forces is that electrical forces: a) attract; b) repel or attract; c) obey the inverse-square law; d) act over shorter distances; e) are weaker.
b) repel or attract.
The force between two charged particles depends: a) only on the amount of charge on the two particles; b) on the total charge and gravity; c) only on the distance between the particles; d) on the charge on the quarks; e) on the amount of charge on the two particles and their distance from each other.
e) on the amount of charge on the two particles and their distance from each other.
According to Coulomb’s law, a pair of particles that are placed twice as far apart will experience forces that are: a) half as strong; b) one-quarter as strong; c) twice as strong; d) 4 times as strong.
b) one-quarter as strong.
__________ is when you bring a charged object near another object and cause a movement of charge.
Induction
Conducting materials are composed of atoms with
loose outer electrons.
When a material has no electrical resistance it is
a superconductor.
Electrons can be transferred from one place to another by the process of: a) friction; b) contact, which means touching; c) induction, which means non-touching; d) all of the above; e) none of the above.
d) all of the above.
If you comb your hair and the comb becomes negatively charged, then your hair becomes
positively charged.
The unit of electrical resistance is the
ohm.
Heat a copper wire and its electric resistance
increases.