Static Electricity
What is static electricity?
an electrical charge that can be
held in one place
What do batteries do?
Convert chemical energy to electrical energy.
What is an electrolyte?
substance that conducts an
electric current
What does a resistor do?
It resists the flow of electrons in the electric current.
What is a series circuit?
a closed electrical pathway where
electrons have only one path to follow
What causes static electricity?:
Friction
What's an Electric load?
any device that transforms electrical
energy into other forms of energy
What are electrodes?
two terminals in a battery or other
electricity source
What is the formula for resistance?
R=V/I
What is a parallel circuit?
have multiple pathways for current to flow.
What is an Electric discharge?
the removal of electric charge from
an object
What is Electric Potential Difference per coulumb?
Voltage
What are two types of battery cell? Explain
Wet Cell- uses acid solution form of
electrolytes
Dry Cell- uses moist paste form of
electrolytes
SYMBOL FOR OHMSΩ DRAW.
Ω
1 advantage of Parallel Circuits
Breaking the pathway for one device in the
circuit does not affect the other devices.
Adding more items to a parallel circuit
decreases the overall resistance of the
circuit by providing the current with more
pathways to flow
What does an insulator do?
do not allow charges to move easily
charges stay in the same place once
transferred
What is Potential Difference?
the difference in electric
potential between two points
What all do we need to light up a bulb?
Battery, conducting wire, bulb or switch (you might consider)
What is the resistance of a flashlight
bulb if there is a current of 0.75 A
through the bulb when connected to a
3.0 V battery?
R= V/I
= (3.0 V)/(0.75 A)
= 4.0 𝝮
The resistance of the flashlight bulb is
4.0 𝝮.
Disadvantage of Series Circuits:
Decorative Lights – if one light goes out,
they all go out
Why do you think metals are able to conduct
electricity?
Metals easily lose electrons when we combine
them into compounds. So when objects are
rubbed together, electrons more easily leave
metal atoms and transfer to the other object.
What are two kinds of energy? Explain
Potential energy- energy that is stored in an object
Kinetic energy- energy a moving object has because
of its motion
What's an Electric Current? What do we measure it in?
the amount of charge passing point in a conductor per second.
We measure electric current in AMPS.
The resistance of a car headlight is 15 Ω. If
there is a current of 0.80 A through the headlight,
what is the voltage across the headlight?
V = IR
= (0.80 A)(15 Ω)
= 12 V
The voltage across the headlight is 12V.
What hapens to the overall resistance when a device is added in series and parallel circuit.
series- the overall resistance increases
parallel- the overall resistance decreases(electron's will take the path with less resistance.