# Electric Current: Basics - PowerPoint PPT Presentation

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Electric Current: Basics. Current Electricity. Current electricity is like current in a river. A high or fast river current means the water is rushing past the shore quickly. A high current in electricity means that the electrons are moving past points in the circuit quickly .

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Electric Current: Basics

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## Electric Current: Basics

### Current Electricity

• Current electricity is like current in a river.

• A high or fast river current means the water is rushing past the shore quickly.

• A high current in electricity means that the electrons are moving past points in the circuit quickly.

### Current Electricity

• Electrons keep moving around the circuit with a constant source of energy (ex. Battery, power outlet, etc.)

• Energy gives the electrons a ‘push’

### Current Electricity

• Current: the rate of electron flow past a given point in a circuit

### Current Electricity

• Symbol: I

• Units: Amperes (A)

• Measured with: Ammeter

### Potential Difference

• Potential Difference/Voltage: the difference in electrical energy per unit charge measured at two different points

• Symbol: V

• Units: Volts

• Measured with: Voltmeter

### What is an Electric Circuit?

• An electric circuit is a continuous path through which an electric current is passed

• Electric circuits convert electrical energy into other forms of energy we need – such as heat or light.

### Parts of an Electric Circuit

• There are five basic parts found in a simple electric circuit.

### Parts of an Electric Circuit

• Energy Source

• Provides electrical energy in a circuit

• E.g. battery, electrical outlet

Battery

(energy source)

### Parts of an Electric Circuit

• An electrical device that converts electrical energy into another form

• E.g. light bulb, motor

Light Bulb

### Parts of an Electric Circuit

• Switch

• A control device that opens or closes a circuit

Switch

### Parts of an Electric Circuit

• Connectors

• Conducting wires carry the electrical energy

Connectors

### Parts of an Electric Circuit

• Meters

• Measure current (ammeter) andpotential difference (voltmeter)

Ammeter

Voltmeter

### Electrical Symbols

Energy Source – One Battery

One Battery

(One Dry Cell)

Two Batteries

(Two Dry Cells)

Light Bulb

Light Bulb

Motor

Open Switch

Closed Switch

Conducting wire

Voltmeter

Ammeter

Resistor