Download Science 9 Circuit Diagrams Circuit Diagrams (aka ) Schematics

Science 9
Circuit Diagrams
Circuit Diagrams (aka
)
• Schematics have four basic parts:
– Source: where electrical energy comes from
–
–
Conductor: wire through which the current flows
Control/Switch: device that can turn the device on or off
–
Load(s): items along the circuit that convert electricity into other forms
Circuits can be:
1) Closed:
-Charges (
) can flow without interruption
2) Open:
- The electron flow has been
the circuit
by a break in
-The circuit is not complete
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Steps to Drawing a Circuit Diagram
• Draw with a pencil and ruler on graph paper or unlined paper
• Place components in a square or rectangular arrangement
• Make conductors straight lines with square corners
• Arrange diagram so conductors do not cross
Types of Circuits
•
•
Series
•
•
•
•
All charges move through the
current passes through each load
if load is
resistance values
•
•
separate current path for each load
resistance
as loads are added (more paths
added)
Advantage: Can turn off one branch of the circuit without affecting the
other branches
circuit is
Parallel
•
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1) Draw a circuit with a 2-cell battery and a light bulb.
2) Draw a circuit with a 4 – cell battery, 2 light bulbs, and an open switch that runs the light
bulb
3) Draw a circuit with a 1.5 V cell, light bulb, and a closed switch that only runs a motor
4) Draw a circuit consisting of a four cell battery connected to two lamps in parallel (each controlled by
separate switches) to an ammeter
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Your Task
Read p 311 - 316
Check & Reflect # 1 – 9 & 11 page 316
Section Review # 1 – 5, 7, 8, & 9 page 317
Circuit Diagram Worksheets
1. Draw a circuit diagram with 2 cells connected in series, 2 loads in series and an open switch. Show the
direction of electron flow in the circuit.
2. Draw a circuit diagram containing a 3.0 V battery, a switch, a load and an ammeter measuring the
current flowing through the load. Show the direction of electron flow in the circuit.
3.
Draw a circuit diagram containing a single cell, a switch, a light bulb, and a fuse protecting the light bulb.
Show the direction of electron flow in the circuit.
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4.
Draw a circuit diagram containing a 4.5 V battery, and two lamps. Each lamp needs its own switch, and
each switch must control only one lamp. Show a voltmeter hooked up to measure the voltage for one lamp.
5.
Draw a circuit diagram containing a 6.0 V battery, a switch controlling a lamp (and only the lamp), and a
resistor. Draw an ammeter to measure the current flowing through the battery.
6.
Draw a circuit diagram containing a cell, a lamp, a fuse, and a motor. The lamp and the motor should be in
parallel with each other, and one fuse should protect both the lamp and the motor. Show a voltmeter hooked
up to measure the voltage across the motor.
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