May 21, 2012HW: 6.2 PTG, Pg. 612-613, #1-4 and Vocab

Boxes Due Friday

LO: Use a physical model to

describe the flow of electric charges in series and parallel circuits.

SC: Develop a physical

model for electric current and potential energy

Use this physical model to trace the flow of electric charges in series and parallel circuits.

DO NOW: 6.1 Quiz Write LO and SC on

new left side page WDYS/WDYT-pg.

606 Investigate

Part A: vocabulary with pretzels

Ch 6 Section 2

Students assemble like picture on page 607.

Teacher = switch 1 student = battery 1 student – light bulb Rest = charges (only charged when

student has pretzel in their hand)

Part A

Round 1 Battery=energy supply=joules=pretzels Light bulb=dancing student Electric charges=coulomb=students

6230000000000000

Part A

Round 2: Battery=energy supply=joules=pretzels

“I am one VOLT, which means, I give one joule (pretzel) of energy to each coulomb (student)”

“Please move along, one coulumb (student) per second is one amp of current”

Light bulb=dancing student “I just received one joule (pretzel) of energy from

that coulomb (student) Electric charges=coulomb=students

“I just gained one joule of energy from the battery” “I just gave one joule of energy to the light bulb”

Part A

Round 3 Battery is 3 Volts Gives each coulomb 3 joules of energy

Part A

Round 4 Battery is 1 Volt Current is 2 amps=2 coulombs per second

May 22, 2012HW: 6.2 PTG, Pg. 612-613, #1-4 and Vocab

Boxes Due Friday

LO: Use a physical model to

describe the flow of electric charges in series and parallel circuits.

SC: Develop a physical

model for electric current and potential energy

Use this physical model to trace the flow of electric charges in series and parallel circuits.

DO NOW: #9 page 608: a, b,

c, d, e, f Agenda

Investigate Part B: vocabulary

with pretzels

Students answer…

#9 page 608: a, b, c, d, e, f

Part B

Series circuit 2 light bulbs, each must get some energy Battery is 1 Volt Charges have to spread their joule (pretzel) to

each light bulb equally

Students answer…

#2 a #3 a, b, c, d

#4

1V battery = 1 J of energy (pretzel) for each coulomb (student) of charge

Charges flowed at the rate of 1 amp (or 1 coulomb per second=1 student per second)

The # of Joules (pretzels) per second that a bulb receives determines how BRIGHT the bulb is

Joules per second=Power (measured in Watts) 1 Watt=1 Joule/sec Which will be brighter? A 100-W bulb or a 40-

W bulb? Why?

Students answer…

#4a: copy table at top page 609

One Bulb 2 bulbs in series Brighter?

Battery (V) Current (amps)

Battery (V) Current (amps)

1 1 1 1

1 1 2 1

1 1 1 2

1 1 2 2

2 2 4 1

2 2 2 3

4 1 3 2

Vocabulary Boxes

Potential energy Electric potential

energy Battery Resistor Coulomb Current

Voltage Volt Joule Ampere Series circuit Watt

HW: 6.2 PTG, Pg. 612-613, #1-4

LO: Use a physical model to

describe the flow of electric charges in series and parallel circuits.

SC: Develop a physical

model for electric current and potential energy

Use this physical model to trace the flow of electric charges in series and parallel circuits.

DO NOW: Find the joules per

second for a 3 volt battery, with a 5 amp current.

Investigate Part A: vocabulary

with pretzels

Physics Talk Expectations

Volume

Actions

Questions?

Finished with the slide?

Students are quiet and headphones are off

Notebooks are out and pencils are recording information from the board

Students must raise their hand to ask or answer questions.

Please wait patiently without talking or distracting your neighbor

Physics Talk 6.2

How is your bloodstream similar to an electric current?

Like blood cells, electrons carry energy to the light bulb. The energy is used up (pretzel/joule), but the electron is not (student)

Physics Talk 6.2

What is electrical potential energy?

Energy that has not get been used up and is being help by an electron or battery

Physics Talk 6.2

What is a resistor? An object in an electrical circuit that consumes energy. This object will often determine how quickly the electrons can pass by (current)

Physics Talk 6.2 An explanation of

the electron shuffle

Physics Talk 6.2

What is a series circuit?

An electrical circuit where there is only one path for the electrons to follow

The electrons move with the same current throughout the entire circuit

Physics Talk 6.2

How do we represent a series circuit?

Physics Talk

What determines the brightness of a light bulb?

The number of Watts, or Joules per second.

You can use the following equation for a series circuit (that you Ayo and Arthur)

W = Power V= Volts A= current (amperes) R = resistors, or

number of light bulbsR

AVW

Essential Questions-pg. 612

What does it mean? How do you know? Why should you care?

Vocabulary BoxesBook Definition – Your Definition - Picture

Potential energy Electric potential

energy Battery Resistor Coulomb Current

Voltage Volt Joule Ampere Series circuit Watt