Electrical Circuits

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# Electrical Circuits - PowerPoint PPT Presentation

Electrical Circuits. Circuits: . A circuit is made up of a power supply , connecting wires &amp; various elements that allow current to leave a power source, travel through the elements &amp; return back to the power source. Common Electric Parts. Battery/Power Source Bulb. V. A.

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## PowerPoint Slideshow about 'Electrical Circuits' - renee

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Presentation Transcript

### Electrical Circuits

Circuits:
• A circuit is made up of a power supply, connecting wires & various elements that allow current to leave a power source, travel through the elements & return back to the power source.
Common Electric Parts
• Battery/Power Source
• Bulb

V

A

Common symbols (cont’d)
• Switch
• Push-button Switch
• Resistor
• Voltmeter
• Ammeter
Circuits

Power Supply

- +

A

v

Ammeter

Resistor

Voltmeter

Types of Circuits:

Trick to help identify type of circuit:

Series: Current has only one option to flow

Parallel: Current has more than one option to flow through

• There are 2 types of circuits:
• 1. Series Circuit
• 2. Parallel Circuit

SERIES

PARALLEL

Series Circuits
• Components are connected end to end
• Current only follows one path
• If one part of the circuit is broken, the entire circuit will stop functioning
• Eg: Christmas tree lights
Parallel Circuits
• Circuit that contains at least one branch
• Current can follow at least 2 different paths
• If part of the circuit is defective another part may still be able to operate.
• Eg: headlights on a car

A

A

Example

Series or Parallel?

2.

1.

PARALLEL

SERIES

3.

4.

SERIES

PARALLEL

Adding an Ammeter into a Circuit
• In order to measure the current traveling through a circuit, an ammeter must be inserted into the circuit.
• An ammeter is always connected inside the circuit in series.

A

Connecting An Ammeter

In each diagram, is the ammeter hooked up correctly to these circuits?

A)

B)

C)

A

A

NO

A

YES

YES

F)

E)

D)

NO

A

YES

NO

A

A

Adding a Voltmeter to a Circuit
• In order to measure the voltage traveling through a circuit, a voltmeter must be inserted into the circuit.
• A voltmeter is always connected outsidethe circuit in parallel.

V

Connecting A Voltmeter

In each diagram, is the voltmeter hooked up correctly to these circuits?

V

A)

B)

C)

V

V

NO

YES

YES

F)

E)

D)

V

YES

V

YES

NO

V

KEY POINTS
• Voltmeter – always placed outside of circuit attached in parallel
• Ammeter – is always placed inside circuit attached in series
Setting up a Circuit
• PARV acronym
• P-ower
• A-mmeter
• R-esistor
• V-olt Meter