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DIRECT CURRENT CIRCUITS
Electric cells produce Direct Current (DC), a kind of electricity where electrons travel
in one direction on a continuous pathway called a circuit.
In a parallel circuit there
are two or more
pathways or loops
from the power supply.
In a series circuit there is only one
pathway or loop from the power
supply.
When drawing circuits we use special symbols and conventions. Some common
components of circuits are listed below with a description and symbol(s).
Electrical
Source
A device that converts
energy to electric energy.
Switch
A device that controls the
current in an electric
circuit. A switch lets you
open and close a circuit to
stop or allow the flow of
electricity.
Load
Resistor
A device that changes
electric energy to
another type of useful
energy
A device that changes the
flow of current.
Mathematically can often
be treated the same as
loads.
3 Cell Battery
Open
Lamp
Radiant energy
Ainsley Eyriana 4643
Fuse
A device that breaks if there is too much
current. This stops the flow of electricity.
Wire
Is a conductive material along which
electricity flows.
100V DC Power Supply
Closed
Motor
Kinetic energy
Identify the circuit’s arrangement. Then if the diagram uses actual imagery of the components, redraw
with circuit symbols. If the diagram uses circuit symbols, list the component and their function.
Ainsley Eyriana 4643
DC Circuits Match to Make a Word Activity
Match each symbol or descrption to its term. Put the letters in order to spell a word.
Looks like your circuit skills are un-…
 Conductor
A
 Direct Current
A
 Electrical Source
P
 Series
L
 Resistor

R
D
 Open Switch
E
 Closed Switch
E

A device that converts energy to
electrical energy e.g. batteries change
chemical energy to electrical energy.
A device that controls the flow of
electrons, allowing them to flow based on
its position e.g. closed and the circuit is on.
L
 Fuse

A material that allows electrons to flow
freely along it e.g. a wire.
L
Load
 Parallel

Electrons travel in one direction on a closed
pathway.


There are two or more pathways to the
power supply that electrons can travel
along.
Ainsley Eyriana 4643





Identify the circuit’s arrangement. Then if the diagram uses actual imagery of the components, redraw
with circuit symbols. If the diagram uses circuit symbols, list the component and their function.
Parallel Circuit
1.5V
Series Circuit
2 cell battery: converts chemical energy to electrical energy
for the circuit.
Open switch: Controls the flow of current in the circuit;
because it is in the open position the lights would be off.
Lamps: loads that convert electrical energy to light energy.
Ainsley Eyriana 4643
Wires: conductors that allow electrons to flow along them.
Series Circuit
Parallel Circuit
9V power supply: converts chemical energy to electrical energy
for the circuit.
Fuse: Breaks if there is too much current for the circuit,
stopping the current flow.
Closed switches: Control the flow of current in the circuit;
because it is in the closed position the loads would be on.
Lamp: load that convert electrical energy to light energy.
Motor: load that convert electrical energy to kinetic energy.
Wires: conductors that allow electrons to flow along them.
DC Circuits Match to Make a Word Activity
Match each symbol or descrption to its term. Put the letters in order to spell a word.
Looks like your circuit skills are un-…
 Conductor
A
 Direct Current
A
 Electrical Source
P
 Series
L
 Resistor

R
Electrons travel in one direction on a closed
pathway.
A material that allows electrons to flow
freely along it e.g. a wire.
A device that converts energy to
electrical energy e.g. batteries change
chemical energy to electrical energy.
L
Load
 Parallel
D
A device that controls the flow of
electrons, allowing them to flow based on
its position e.g. closed and the circuit is on.
L
 Fuse
 Open Switch
E
 Closed Switch
E
There are two or more pathways to the
power supply that electrons can travel
along.
Ainsley Eyriana 4643
P
A
R
A
L
L
E
L
E
D









