Download Static Electricity

Name:
Class Period:
Date:
Static Electricity
Physics 5m: Students know static electric fields have as their source some arrangement of electric charges
Focus Question: What happens when you shock someone?
Electric Fields Continued
Any ______________________________________ causes an _______________________, which exerts
_____________ and causes other _____________________ to ______________.
The force of an electric fields can be shown
using __________________. Field lines show
how a ___________________ would move if
placed in the electric field. Therefore, electric
field lines points _____________ a negative
particle and __________________ a positive
particle.
Force of an electric field is described by the equation:
Force = k (charge 1 x charge 2) / distance 2 or
F = kq1q2 / r2
Therefore, as the distance between two charged particles increases, the force between them
_________________. This is an ______________ relationship.
Also, as the charge of an object increases, the force created by that object also _______________. This is a
_______________ relationship.
Concept Check: If two charged particles are moved closer to one another, what happens to the force
between them?
Concept Check: Charge A has a value of 3 Coulombs (C), and charge B has a stronger charge of 12
C. Which charge exerts more force?
Concept Check: Draw a positive charge and a negative charge. Draw electric field lines for both.
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Name:
Class Period:
Date:
Static Electricity
What do you do to shock someone?
Static electricity is created when charges build on an object. Static means ______________________, so
static electricity is when charges build on an object and stay where they are. This means that the object has
an __________ distribution of charges. Essentially, this means that an object (or part of an object) has a
___ or ____ charge.
Concept Check: What does “static” mean?
Concept Check: What is static electricity?
When a charged object is placed near a neutral object, the charges in that neutral object re-arrange so that
________________ charges are close together and ___________ charges are far apart. This rearrangement of charges is caused ____________________________________.
Draw what happens when you stick a balloon to a wall:
Why does the balloon eventually fall?
Discharging Static Electricity
When static electricity is lost, it is called _________________. This generally occurs via the transfer of
________________ from the _______________ object to the _________________ object. When this
happens, both objects are left _________________. They have lost their charge, so are said to be
_________________.
In general, if two objects are not touching, they will not transfer electrons, and thus will not discharge.
However, if a charged object touches something, it will begin to transfer its electrons if ________________,
or to gain electrons if ________________. Eventually, both objects will end up with the same charge or will
end up _________________. This occurs much more quickly with __________________ because their
electrons are ___________________________.
Concept Check: How can you get rid of static electricity?
Concept Check: Draw what will happen if you put a charged balloon near a soda can. Then draw
what will happen if you touch the balloon to the soda can.
Near:
Touching:
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Name:
Class Period:
Date:
If static electricity builds up enough, however, ____________________ can jump through air from the
______________ object to the ________________ object. This jump is known as
___________________________. It is the basis of _______________ and _____________________.
Describe how you shock someone.
Describe (in general) what causes lightning.
Current Electricity
Current electricity is what we are normally referring to when we describe “electricity” (or current). Current
electricity is the steady flow of _____________ through a ________________. That movement of electrons
is ___________! (The electrons, themselves, however are ___________.) We can convert the energy from
the movement of the electrons into light, heat, etc! Current electricity flows through a ______________.
Skim sections 7.5, 7.6. 7.7, and 7.10 to complete these two charts.
Static Electricity vs. Current Electricity
Static Electricity
Current Electricity
How are they similar?
How are they different?
Definition
Examples
Conductor
Insulator
We learned during unit 1 that metals are good conductors. Think of a metallic bond. Why are
metals good conductors?
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Name:
Class Period:
Date:
Experiment: Build your own Circuit!
Observations about your materials:
Question: Can you use the materials provided to light the light bulb?
Prediction (describe how you will use them):
Test Predictions:
Conclusions:
Did your results agree with your predictions?
What two things must be true about a circuit in order to allow current electricity to run through it?
Circuits
Current electricity runs through _____________________. What is actually flowing through the circuit?
This flow of ______________________ is called ___________________. Current is just how many
electrons flow in a given time.
In order to light a bulb (or do any other work), the circuit must be ____________________. Why?
The circuit must also be made of a _______________________. Why?
But, what makes the electrons flow? Each battery has a voltage. Voltage is the potential difference
between the two ends of the battery. This potential difference (a difference in charge that can cause
movement) results from _____________________________ that are at each end of the battery. Basically,
one end is positive and one end is negative. Because opposites attract, ________________ want to flow
from the _______________ end to the ______________ end. So, the electric fields cause potential
difference between the two ends. This potential difference, called voltage, causes electrons to move, which
is current. Voltage causes current.
Voltage is measured in ______________ and is measured with a _________________.
Current is measured in ___________ and is measured with a ____________________.
Both voltage and current can be measured using a __________________________. It is a voltmeter,
ammeter, and ohmmeter (for measuring resistance) all in one!
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