Lecture One

M agnetic R esonance I maging “MRI” BME 551 Dr. Rami J. Oweis

Electricity and Magnetism ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Electricity and Magnetism ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Electricity and Magnetism ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Electricity and Magnetism ,[object Object]

Electricity and Magnetism ,[object Object],[object Object]

Electricity and Magnetism ,[object Object],[object Object],[object Object]

Electrical Charges ,[object Object],[object Object],[object Object],[object Object]

Questions to answer ,[object Object],[object Object],[object Object]

Charged particles ,[object Object],[object Object]

Ions ,[object Object],[object Object]

Anti-matter ,[object Object],[object Object],[object Object],[object Object]

Electrical field ,[object Object],[object Object]

Electrostatics Out from positive charge Toward a negative charge Like charges repel one another Unlike charge attract each other uncharged fields no electric field The electric field is most easily visualized as imaginary lines radiating from an electric charge

Electric field lines shown moving from a positive particle

Electrical field points from (+) to (-)

Forces acting on charged particles ,[object Object],[object Object]

Static electricity ,[object Object],[object Object]

Colliding with anti-matter ,[object Object]

Not colliding with other matter ,[object Object]

Like charges repel ,[object Object],[object Object],Like charges push away from each other

Basics of Static Electricity ,[object Object],[object Object]

Cause of static electricity ,[object Object],[object Object]

Electrons pulled from orbit ,[object Object],[object Object]

Charges on surface ,[object Object],[object Object]

Prefers dry air ,[object Object],[object Object]

Force field causes attraction ,[object Object],[object Object]

Attraction ,[object Object],[object Object]

Why sparks fly ,[object Object],[object Object]

Strong forces hold electrons ,[object Object]

Once it starts ,[object Object],[object Object]

Explaining Static Electricity ,[object Object]

Causing excess charges ,[object Object]

Excess of charges ,[object Object]

Stealing electrons ,[object Object]

Adhesive force takes electrons ,[object Object],[object Object]

Not friction ,[object Object],[object Object]

Triboelectric Series ,[object Object],[object Object]

Static Electric Sparks and Lightning ,[object Object]

Conditions for sparks ,[object Object]

In the clouds ,[object Object]

Sparks require conductors ,[object Object],[object Object],[object Object],[object Object]

Charges move in conductor ,[object Object]

Charges move in conductor ,[object Object],[object Object]

Anatomy of a spark ,[object Object]

Heats up the air ,[object Object]

Lower resistance ,[object Object]

Electrons stop jumping ,[object Object]

Lightning is a real big spark ,[object Object],[object Object]

Has high electrical pressure ,[object Object]

Most go from cloud to cloud ,[object Object]

Thunder ,[object Object],[object Object]

Controlling Static Electricity ,[object Object],[object Object]

Increase humidity ,[object Object],[object Object]

Moisturize skin ,[object Object],[object Object]

Ground yourself ,[object Object],[object Object]

Lecture One

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Lecture One