New Area of Focus, Electricity and Magnetism Copyright © 2010 Ryan P. Murphy

What would life be like without it electricity? Copyright © 2010 Ryan P. Murphy

Much different than it is for most of us.

Much different than it is for most of us.

Does somebody want to try and define the word electricity?

There is no single definition called "electricity." ELECTRICITY DOES NOT EXIST Copyright © 2010 Ryan P. Murphy

Electricity is a variety of independent science concepts all with one single name. Copyright © 2010 Ryan P. Murphy

These are the questions and definitions we need to generate a definition for electricity? What is electric charge? What is electrical energy? What are electrons What is electric current? What is an imbalance of charge? What is an electric field? What is voltage? What is electric power? What is a spark? What is electromagnetism? What is electrical science? What is electrodynamics? What is electrostatics? What are electrical phenomena? Copyright © 2010 Ryan P. Murphy

Electricity is related to charges, and both electrons (-) and protons (+) carry a charge. Copyright © 2010 Ryan P. Murphy

Video! Introduction to Electricity

We will skip most of the atomic information We will skip most of the atomic information. We will examine circuits and static charges for this unit. Copyright © 2010 Ryan P. Murphy

Electrons are negatively charged Copyright © 2010 Ryan P. Murphy

Electrons are negatively charged Copyright © 2010 Ryan P. Murphy

Electrons are negatively charged Protons (nucleus) are positively charged Copyright © 2010 Ryan P. Murphy

Electrons are negatively charged Protons (nucleus) are positively charged Copyright © 2010 Ryan P. Murphy

Electrons are negatively charged Protons (nucleus) are positively charged Copyright © 2010 Ryan P. Murphy

Electrons are negatively charged Protons (nucleus) are positively charged Their charges are about equal Copyright © 2010 Ryan P. Murphy

Electrons are negatively charged Protons (nucleus) are positively charged Add Electrons – Atom becomes more negatively charged. Copyright © 2010 Ryan P. Murphy

Electrons are negatively charged Protons (nucleus) are positively charged Take away (strip) electrons than the atom becomes more positively charged. Copyright © 2010 Ryan P. Murphy

Life occurs because of electrostatic charges.

Life occurs because of electrostatic charges. Without them, life would simple unravel.

Lightning is a big spark that occurs when electrons move from one place to another very quickly because of the unequal distribution of electrons. Copyright © 2010 Ryan P. Murphy

Electric Fields: The funky area near any electrically-charged object. Replace electrostatic for funky. Copyright © 2010 Ryan P. Murphy

Electric Fields: The funky area near any electrically-charged object. Replace electrostatic for funky. Copyright © 2010 Ryan P. Murphy

Electric Fields: The funky area near any electrically-charged object. Replace electrostatic for funky. Copyright © 2010 Ryan P. Murphy

Copyright © 2010 Ryan P. Murphy

Opposite charges attract. Copyright © 2010 Ryan P. Murphy

Opposite charges attract. Copyright © 2010 Ryan P. Murphy

The Same forces repel. Copyright © 2010 Ryan P. Murphy

The Same forces repel. Copyright © 2010 Ryan P. Murphy

Which one is right and which is wrong? Copyright © 2010 Ryan P. Murphy

Which one is right and which is wrong? Answer: They are both wrong. Copyright © 2010 Ryan P. Murphy

Which one is right and which is wrong? Answer: They are both wrong. Copyright © 2010 Ryan P. Murphy

Which one is right and which is wrong? Answer: They are both wrong. Copyright © 2010 Ryan P. Murphy

Which one is right and which is wrong? Answer: They are both wrong. Copyright © 2010 Ryan P. Murphy

Which one is right and which is wrong? Answer: They are both wrong. Copyright © 2010 Ryan P. Murphy

Which one is right and which is wrong? Answer: They are both wrong. Copyright © 2010 Ryan P. Murphy

Which one is right and which is wrong? Answer: Now they are both right. Copyright © 2010 Ryan P. Murphy

Static Electricity: The imbalance of positive and negative charges. Copyright © 2010 Ryan P. Murphy

Activity- Bad Hair Day Demonstration. Rub parachute all around head. Question: Why does this happen? Copyright © 2010 Ryan P. Murphy

Electrons from your body move into the parachute (hat or sweater). Answer! Electrons from your body move into the parachute (hat or sweater). This gives you a positive charge. Your hair is also positive. Like charges repel so hair tries to get away from body. Copyright © 2010 Ryan P. Murphy

Electrons from your body move into the parachute (hat or sweater). Answer! Electrons from your body move into the parachute (hat or sweater). This gives you a positive charge. Your hair is also positive. Like charges repel so hair tries to get away from body. Copyright © 2010 Ryan P. Murphy

Electrons from your body move into the parachute (hat or sweater). Answer! Electrons from your body move into the parachute (hat or sweater). This gives you a positive charge. Your hair is also positive. Like charges repel so hair tries to get away from body. Copyright © 2010 Ryan P. Murphy

Electrons from your body move into the parachute (hat or sweater). Answer! Electrons from your body move into the parachute (hat or sweater). This gives you a positive charge. Your hair is also positive. Like charges repel so hair tries to get away from body. Copyright © 2010 Ryan P. Murphy

Electrons from your body move into the parachute (hat or sweater). Answer! Electrons from your body move into the parachute (hat or sweater). This gives you a positive charge. Your hair is also positive. Like charges repel so hair tries to get away from body. Copyright © 2010 Ryan P. Murphy

Answer! Electrons from your body move into the parachute (hat or sweater). This gives you a positive charge. Your hair is also positive. Like charges repel so hair tries to get away from body. + + + Copyright © 2010 Ryan P. Murphy

Demonstration - Static Electricity Observe two balloons without a build up of a charge. Copyright © 2010 Ryan P. Murphy

Demonstration - Static Electricity Observe two balloons without a build up of a charge. Now rub balloons in parachute. How are the behaving now? Copyright © 2010 Ryan P. Murphy

Demonstration - Static Electricity Observe two balloons without a build up of a charge. Now rub balloons in parachute. How are the behaving now? Copyright © 2010 Ryan P. Murphy

Demonstration - Static Electricity Observe two balloons without a build up of a charge. Now rub balloons in parachute. How are the behaving now? Copyright © 2010 Ryan P. Murphy

Demonstration - Static Electricity Observe two balloons without a build up of a charge. Now rub balloons in parachute. How are the behaving now? Copyright © 2010 Ryan P. Murphy

Activity! Static Balloons Blow up a balloon and tie it off. Write name on it with soft pen. Rub balloon against hair and quickly stick to wall (everyone together). Observe what happens, Whose balloon will last the longest? Copyright © 2010 Ryan P. Murphy

Activity! Static Balloons Blow up a balloon and tie it off. Write name on it with soft pen. Rub balloon against hair and quickly stick to wall (everyone together). Observe what happens, Whose balloon will last the longest? Copyright © 2010 Ryan P. Murphy

Activity! Static Balloons Blow up a balloon and tie it off. Write name on it with soft pen. Rub balloon against hair and quickly stick to wall (everyone together). Observe what happens, Whose balloon will last the longest? Copyright © 2010 Ryan P. Murphy

Activity! Static Balloons Blow up a balloon and tie it off. Write name on it with soft pen. Rub balloon against hair and quickly stick to wall (everyone together). Observe what happens, Whose balloon will last the longest? Copyright © 2010 Ryan P. Murphy

Activity! Static Balloons Blow up a balloon and tie it off. Write name on it with soft pen. Rub balloon against hair and quickly stick to wall (everyone together). Observe what happens, Whose balloon will last the longest? Copyright © 2010 Ryan P. Murphy

Activity! Static Balloons Blow up a balloon and tie it off. Write name on it with soft pen. Rub balloon against hair and quickly stick to wall (everyone together). Observe what happens, Whose balloon will last the longest? Copyright © 2010 Ryan P. Murphy

Answer to wall sticking balloon. Electrons from hair are removed and put into balloon. Balloon has slight negative charge. The atoms orient and wall has slight positive charge. Like charges attract and balloon sticks.

Answer to wall sticking balloon. Electrons from hair are removed and put into balloon. Balloon has slight negative charge. The atoms orient and wall has slight positive charge. Like charges attract and balloon sticks.

Answer to wall sticking balloon. Electrons from hair are removed and put into balloon. Balloon has slight negative charge. The atoms orient and wall has slight positive charge. Like charges attract and balloon sticks.

Answer to wall sticking balloon. Electrons from hair are removed and put into balloon. Balloon has slight negative charge. The atoms orient and wall has slight positive charge. Like charges attract and balloon sticks.

Answer to wall sticking balloon. Electrons from hair are removed and put into balloon. Balloon has slight negative charge. The atoms orient and wall has slight positive charge. Opposite charges attract and balloon sticks.

Answer to wall sticking balloon. Electrons from hair are removed and put into balloon. Balloon has slight negative charge. The atoms orient and wall has slight positive charge. Opposite charges attract and balloon sticks.

We usually only notice static electricity in the winter when the air is very dry. During the summer, the air is more humid.

We usually only notice static electricity in the winter when the air is very dry. During the summer, the air is more humid. The water in the air helps electrons move off you more quickly, so you can not build up as big a static charge.

If your car gets struck by lightning in a thunderstorm, will you be safe. Why?

If your car gets struck by lightning in a thunderstorm, will you be safe. Why?

Answer: You will be safe because your cars metal chassis acts like a Faraday Cage. The charged particles travel around the outside of the car and into the ground.

Answer: You will be safe because your cars metal chassis acts like a Faraday Cage. The charged particles travel around the outside of the car and into the ground.

Answer: You will be safe because your cars metal chassis acts like a Faraday Cage. The charged particles travel around the outside of the car and into the ground.

Answer: You will be safe because your cars metal chassis acts like a Faraday Cage. The charged particles travel around the outside of the car and into the ground.