A parallel circuit with two bulbs

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# A parallel circuit with two bulbs - PowerPoint PPT Presentation

Electricity model. Contents. Introducing the model. A series circuit with two bulbs . A parallel circuit with two bulbs . Things to think about . Model. switch off!. click here to close the switch. Return to menu. click here to increase voltage. push!. switch on!.

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Presentation Transcript

Electricity model

Contents

Introducing the model

A series circuit with two bulbs

A parallel circuit with two bulbs

Model

switch

off!

push!

switch

on!

dim bulb

push!

switch

on!

bright bulb

Series circuit

switch

off!

Series circuit

push!

switch

on!

very dim bulbs

Parallel circuit

switch

off!

Parallel circuit

push!

switch

on!

A

V

• The flow of electricity is called the current.
• Ammeters are used to measure this current (symbol )
• Where in the circuit do you have to place an ammeter to measure the flow of electricity?
• The energy (or push) on the charges is called the voltage.
• Voltmeters are used to measure this voltage (symbol )
• When the charges are in the bulb they transform their energy into thermal energy (heat) and light energy.
• Where in the circuit do you have to place a voltmeter to measure energy lost from the circuit in the bulb?

• Remember: the flow of electricity is called the current.
• Look back at the first circuit.
• What do you notice about the current along all four sides of the circuit?
• What do you notice about the current when the voltage is increased?
• Now look at the series circuit.
• What do you notice about the current when you put two bulbs together in series?
• Is the current larger or smaller when you put more bulbs in a circuit?