Transcript Civics – Unit 1 Jeopardy - Frontenac Secondary School

Grade 9 Science – Unit 4 – Electricity #2
Series and
Parallel
Ohm’s Law
Resistance,
Current and
Voltage
More R, V and I
plus Power and
Efficiency
Producing
Electricity
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A circuit with only
one path
What is
a Series Circuit?
It is the Voltage Load (Vload)
across each load in a series
circuit when the energy
source is 60V and three loads
occur on the circuit
What is 20V?
It is the Voltage Load (Vload)
across each load in a parallel
circuit when the energy
source is 60V and three loads
occur on the circuit
What is 60V?
The voltage load is the same at
each load as the energy source
since each load in on its own
path and receives the full energy
from the source
When the energy source is
connected to this type of
circuit, the electrons have
different paths to follow
What is
a Parallel Circuit?
It is the voltage drop across
each load in a series circuit
when there are two loads for
energy to cross
What is
½ the voltage drop
across the energy source?
In Ohm’s Law, the type of
relationship between
voltage, current and
resistance
What is
Proportional Relationship?
The Ohm’s Law formula when
solving for current
What is I = V / R?
If resistance is constant and
voltage goes down, it
happens to current
What is
Current decrease or goes
down proportional to the
amount voltage decreased?
The voltage when a hair
blower has a 24.0 Ω
resistance and 5.00 A of
current running through it
when the blower is working
What is 120V?
V=I*R
V = 24.0 * 5.00
=120.0
The straight line
relationship between
voltage and current
What is Ohm’s Law?
A measure of the RATE of
electron flow past a given
point in a circuit
What is
Electric Current?
1.0A to 4.3A
What is
the amount of current needed to
stop the human heart from
beating?
Note: A wall outlet delivers 15A
of power
The difference in electric
potential energy per unit of
charge measured at two
different points in a circuit
What is
Voltage
or
Potential Difference?
The ability of a material
to oppose
the flow of electric current
What is Resistance?
Length, Temperature,
Type of Material
and
Cross-Sectional Area
What are
factors that affect resistance?
The way a voltmeter is
connected to a circuit to
measure the potential
difference across a load
What is Parallel?
The device that
measures resistance
What is
an Ohmmeter?
The rate at which electrical
power is produced or used
What is
Electrical Power?
Comparison of the energy
output of a device with the
energy supplied to the device
What is
the efficiency of the device?
The percent efficiency of a
light that uses 200 J of
electrical energy and
produces 50 J of light
energy
What is 25%?
% efficiency = Eout / Ein * 100
= 50 / 200 * 100
= 25
The light’s efficiency is 25%
Energy produced
when water
moves back and forth
What is Tidal Power?
Type of electrical energy
produced when falling
water turns a turbine
What is
Hydro-Electric?
It is how coal, oil and
gas are used to turn
water into steam so the
steam turns a turbine
What is burned?
Type of energy when
thermal energy is moved
from beneath the Earth’s
surface and transferred
into a liquid
What is
Geothermal Energy?
The type of energy that
uses the movement of air
that is created by the
natural processes of a
convection current and
the rotating of the Earth
What is wind?