Intro to Science Ch 13-1

Any charged object that enters a region with an electric field experiences an _____ _____.

electrical force.

Objects can be charged by the transfer of _______.

electrons.

Electric force acts through a _______.

field.

______ charges repel and _______ charges attract.

Like = repel unlike(opposite) = attract

How does the electric force between two positive charges change if the amount of one of the charges is doubled?

The electric force will double.

Electric force acts through ______ ______.

electric fields.

What will happen if a positively charged rod is brought near a 1) metal washer? 2) plastic dish?

1) Energy will easily transfer between the metal washer and the charged rod. 2) Energy will not transfer between the plastic dish and the charged rod.

Which of these are conductors and which are insulators? 1) copper wire 2) rubber tubing 3) wet body 4) a plastic comb 5) a lightening rod 6) a silk scarf 7) a glass pan

1) conductor - copper wire 2) insulator - rubber tubing 3) conductor - wet body 4) insulator - a plastic comb 5) conductor - a lightening rod 6) insulator - a silk scarf 7) insulator - a glass pan

_______ ______ lines point in the direction of the electric force on a positive charge.

Electric field

What is the interaction between two different charges?

They will attract each other (force will pull them together).

What is the interaction between two like charges?

They will repel each other (force will push them apart).

insulator

a material that does not transfer charge easily ex - plastic, cardboard, glass, silk, rubber

conductor

a material that transfers charge easily ex - copper wire, water, metal

electric charge

and electrical property of matter that creates a force between objects

Electric force depends on ______ and ________.

charge and distance.

Electric fields surround ______ ______.

charged objects.

Like charges _____, and opposite charges ______.

like = repel opposite = attract

polarization (of atoms)

one side of a molecule is slightly more positive or negative than the other side of a molecule

What are the two types of charges called?

positive and negative

There are two types of electric charge, ______ and _______.

positive and negative.

The electric force between two charged objects is proportional to the product of the ______ and inversely proportional to the _________ between them squared.

proportional to the product of the charges inversely proportional to the distance between them squared.

What is the electric charge of each of the atomic particles?

proton - positive (pro=good=positive) neutron - neutral (NEUTRon=NEUTRal) electron - negative (electron sounds like electricity and being electrocuted is bad=negative)

An object's electric charge depends on the imbalance of its ______ and _______.

protons and electrons.

How does the electric force between two positive charges change if the distance between the charges is tripled?

the electric force decreases by 1/9th (one ninth)

electric force

the force of attraction or repulsion between objects due to charge

electric field

the region around a charged object in which other charged objects experience an electric force

Charges can move within ________ objects.

uncharged (neutral) objects.

charging by contact

when a negatively charged object comes into contact with a neutrally charged object, the negatively charged object may pass electrons to the neutral object causing it to now have a negative charge

charging by friction

when two different materials are rubbed together causing electrons to be transferred from one material to the other