Physics Term 2 Midterm Exam Flashcards
An atom is said to be ____ if the positive charge of the nucleus
exactly balances the negative charge of the surrounding
electrons.
neutral
states that the magnitude of the force between charge qA and
charge qB, separated by a distance r, is proportional to the magnitude of the charges and inversely proportional to the square of the distance.
Coulomb’s law
is the process of connecting a body to Earth to eliminate
excess charge.
Grouding
The study of electric charges that can be collected and held in
one place is called
Electrostatics
The SI standard unit of charge
Coulomb
Giving a neutral object a charge by touching it with a charged
object is called
Charing by conduction
An electric ____ is a material through which charges move
about easily.
Conductor
A device that helps determine charge using pieces of metal foil
is a(n) ____.
Electroscope
Materials through which electrical charges do not move easily
are electrical ____.
Insulators
Separating the charges in an object without touching it is
called ____.
Charging by induction
The magnitude of the charge of an electron is the ____.
Elementary charge
You can determine whether an object is positively or negatively
charged by bringing an object with the (opposite charge) near it.
A Known
Pulling two side-by-side pieces of tape off the surface of a table
gives the pieces of tape (the same charge).
True
Objects that have the same charge (attract) one another.
Repel
In a neutral atom, the number of (neutrons) must equal the
number of electrons.
Protons
The designation of positive and negative for charges was first
used by (J.J. Thomson).
Benjamin Franklin
Touching a charged object often causes it to (lose) its charge.
True
The force produced by charged objects can be (greater) than
gravitational force.
True
Removing electrons from an atom requires (friction).
Energy
A thundercloud becomes charged when positive and negative
charges are (separated).
True
Atoms become charged when (protons) are removed or added
Electrons
Written Question:
How is charge acquired when two neutral objects are rubbed together?
Which object becomes negatively charged and which becomes positively charged?
Electrons from one of the objects are
transferred to the other. The object that
lost electrons becomes positively charged
and the object that gained electrons
becomes negatively charged.
Written Question:
What are the negative and positive parts of an atom? Where are they located?
The protons are positive and are located
in the nucleus. The electrons are negative
and surround the nucleus.
