Physics Term 2 Midterm Exam

Question 1

An atom is said to be ____ if the positive charge of the nucleus
exactly balances the negative charge of the surrounding
electrons.

Answer 1

neutral

Question 2

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.

Answer 2

Coulomb’s law

Question 3

is the process of connecting a body to Earth to eliminate
excess charge.

Answer 3

Grouding

Question 4

The study of electric charges that can be collected and held in
one place is called

Answer 4

Electrostatics

Question 5

The SI standard unit of charge

Answer 5

Coulomb

Question 6

Giving a neutral object a charge by touching it with a charged
object is called

Answer 6

Charing by conduction

Question 7

An electric ____ is a material through which charges move
about easily.

Answer 7

Conductor

Question 8

A device that helps determine charge using pieces of metal foil
is a(n) ____.

Answer 8

Electroscope

Question 9

Materials through which electrical charges do not move easily
are electrical ____.

Answer 9

Insulators

Question 10

Separating the charges in an object without touching it is
called ____.

Answer 10

Charging by induction

Question 11

The magnitude of the charge of an electron is the ____.

Answer 11

Elementary charge

Question 12

You can determine whether an object is positively or negatively
charged by bringing an object with the (opposite charge) near it.

Answer 12

A Known

Question 13

Pulling two side-by-side pieces of tape off the surface of a table
gives the pieces of tape (the same charge).

Answer 13

True

Question 14

Objects that have the same charge (attract) one another.

Answer 14

Repel

Question 14

In a neutral atom, the number of (neutrons) must equal the
number of electrons.

Answer 14

Protons

Question 15

The designation of positive and negative for charges was first
used by (J.J. Thomson).

Answer 15

Benjamin Franklin

Question 16

Touching a charged object often causes it to (lose) its charge.

Answer 16

True

Question 17

The force produced by charged objects can be (greater) than
gravitational force.

Answer 17

True

Question 18

Removing electrons from an atom requires (friction).

Answer 18

Energy

Question 19

A thundercloud becomes charged when positive and negative
charges are (separated).

Answer 19

True

Question 20

Atoms become charged when (protons) are removed or added

Answer 20

Electrons

Question 21

Written Question:
How is charge acquired when two neutral objects are rubbed together?
Which object becomes negatively charged and which becomes positively charged?

Answer 21

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.

Question 22

Written Question:
What are the negative and positive parts of an atom? Where are they located?

Answer 22

The protons are positive and are located
in the nucleus. The electrons are negative
and surround the nucleus.