UC Santa Cruz Tesla at Santa Cruz County Science Fair

UC Santa Cruz Tesla at UC Santa Cruz Tesla at Santa Cruz County Science Santa Cruz County Science FairFair

UC Santa Cruz Tesla at theUC Santa Cruz Tesla at theSanta Cruz County Science FairSanta Cruz County Science Fair

Thanks to our hostThanks to our host Ms. Lynda Rogers, SC Co Office of EducationMs. Lynda Rogers, SC Co Office of Education

ProgramProgram Introduction Introduction Jacob's LadderJacob's Ladder Mystery Knight in ArmorMystery Knight in Armor

– Fighting LightningFighting Lightning

– Bolt to the faceBolt to the face

– Sparks from the feetSparks from the feet

Facts on Tesla Coil Facts on Tesla Coil Corona Corona Lights without CordsLights without Cords Zorro’s Revenge Zorro’s Revenge


Santa Cruz Institute for Particle Physics SCIPPSanta Cruz Institute for Particle Physics SCIPP Professors Hartmut Sadrozinski, Terry SchalkProfessors Hartmut Sadrozinski, Terry Schalk Coordinator Edward HawkinsCoordinator Edward Hawkins

UC Santa Cruz Department of PhysicsUC Santa Cruz Department of Physics Brian Keeney, Kamal Prasad,Brian Keeney, Kamal Prasad,

Science Teacher Volunteer:Science Teacher Volunteer: Mr. S. Briber (Independence H.S.)Mr. S. Briber (Independence H.S.)


Teaching, Research, OutreachTeaching, Research, Outreach

Elementary Particle PhysicsElementary Particle Physics

Condensed Matter Physics Condensed Matter Physics & Wave Propagation& Wave Propagation

Particle Astrophysics & Particle Astrophysics & CosmologyCosmology


Galaxy

DNA

CellAtom

Nucleus

Electron microscope

Accelerator

SCIPP’s Research SCIPP’s Research extends from the extends from the smallest particlessmallest particles

to to

the largest structures the largest structures

in the Universein the Universe


Graduate and Undergraduate Students Graduate and Undergraduate Students

conduct research in the SCIPP Laboratoriesconduct research in the SCIPP Laboratories

http://scipp.ucsc.eduhttp://scipp.ucsc.edu


Normally you can't see, hear or Normally you can't see, hear or smell electricity, but the Tesla Coil smell electricity, but the Tesla Coil makes makes • Bright sparksBright sparks• Loud crackling noiseLoud crackling noise• The air smell bad (OzoneThe air smell bad (Ozone

SAFETY FIRST!SAFETY FIRST!SAFETY FIRST!SAFETY FIRST!

BRACE YOURSELF!BRACE YOURSELF!BRACE YOURSELF!BRACE YOURSELF!

1 Million 1 Million Volts! Volts!

DANGERDANGER

1 Million 1 Million Volts! Volts!

DANGERDANGER

Distance at least 20 ft. Distance at least 20 ft. Computers, Gameboys, CD players, Computers, Gameboys, CD players,

telephones to the back of the room – telephones to the back of the room – unplugged, switched off!unplugged, switched off!

Hearing aids off, pacemakers out of Hearing aids off, pacemakers out of roomroom


Mystery KnightMystery KnightMystery KnightMystery Knight


Two important concepts:Two important concepts:

Lightning Lightning The Faraday CageThe Faraday Cage


How lightning worksHow lightning works

+

++

+

+

+

+

+

+

+++

++

+++

+ – –

–

–

–

–

–

–

–

– – –

–

–

–

++

+

++ ++ ++ ++ ++ ++ ++ ++ ++++ ++++++++

– – – – – – – – – – – – – – – – – – – – – –

– – – – – – – – – – – – – –

– – – – – – – – – – – –

– – – –

++ ++ ++ ++++++

++ ++

++ ++

++++ ++

++ ++ ++ ++ ++ ++

++++

++ ++ ++

++


LightningLightning

Jacob’s LadderJacob’s Ladder

CoronaCorona

Tesla SparksTesla Sparks

are all related. are all related.

LightningLightning

Jacob’s LadderJacob’s Ladder

CoronaCorona

Tesla SparksTesla Sparks

are all related. are all related.

Principle:Principle: Air becomes ionized, and Air becomes ionized, and

therefore conducts electricity. therefore conducts electricity.

Lot’s of it, so the current heats up the air, Lot’s of it, so the current heats up the air,

excites the atoms/molecules which emit excites the atoms/molecules which emit light.light.


The Faraday CageThe Faraday Cage

Why aren't air planes in Why aren't air planes in grave danger being so grave danger being so close to the clouds and close to the clouds and all?all?

++++ ++

++++

++ ++ ++ ++++++++

– – – – – – – – – – – – – – – – – – – –

– – – –

– –

++++++

++ ++++++

Safest place during a Safest place during a lightning storm is in a plane lightning storm is in a plane or car because it is a or car because it is a Faraday CageFaraday Cage

Answer: They form a Answer: They form a Faraday Cage i.e., they Faraday Cage i.e., they are surrounded by metal; are surrounded by metal; if you are surrounded by if you are surrounded by metal you are safe the metal you are safe the electricity flows around electricity flows around the outsidethe outside


Thomas “DC” Thomas “DC” Edison Edison

Nicola “AC” TeslaNicola “AC” Tesla

vs.vs.


Nicola Tesla as a Daredevil?Nicola Tesla as a Daredevil?

Double Exposure makes it safe!Double Exposure makes it safe!


Tesla RevivalTesla Revival 271 web sites are dedicated to Nicola 271 web sites are dedicated to Nicola

TeslaTesla Join the “Tesla Coil Web Ring” Join the “Tesla Coil Web Ring”

http://nav.webring.yahoo.com/hub?ring=teslaring&list


Voltage Voltage starts starts at 120 at 120 ends ends up at up at

1 million!1 million!

Voltage Voltage starts starts at 120 at 120 ends ends up at up at

1 million!1 million!

TransformerTransformer14,000volt

OutletOutlet120 volt

Resonance circuitResonance circuit1 million

volt

Ask your teachers about Ask your teachers about details!details!

Principle of the Tesla Principle of the Tesla CoilCoil


TransformerTransformerTransformerTransformer

Power out = Power in Power out = Power in

Power = Volt Power = Volt Current Current

Power out = Power in Power out = Power in

Power = Volt Power = Volt Current Current

Where have Where have you seen you seen

this before?this before?

Power in

Power out


Resonance circuitResonance circuitResonance circuitResonance circuit

Amplitude =Force

M (f2natural – f2

force)

A kick at the right frequency A kick at the right frequency build up and gets you sky-high!build up and gets you sky-high!A kick at the right frequency A kick at the right frequency build up and gets you sky-high!build up and gets you sky-high!


Electrical Electrical current current flows on the flows on the OUTSIDE of OUTSIDE of a metal!a metal!

In a thunderstorm stay in the car! In a thunderstorm stay in the car!

GroundGround

The armored suit is safe!The armored suit is safe! It's a Faraday Cage – no It's a Faraday Cage – no

electric field allowed insideelectric field allowed inside

The armored suit is safe!The armored suit is safe! It's a Faraday Cage – no It's a Faraday Cage – no

electric field allowed insideelectric field allowed inside

Invisible Invisible currentcurrent

Visible Visible sparkssparks


ZorroZorroZorroZorro

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UC Santa Cruz Tesla at Santa Cruz County Science Fair