l13 - Today HW and Extra Credit due Thursday 8am Exam #2 is...

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ISP209s10 Lecture 13 -1- Today • HW and Extra Credit due Thursday 8am • Exam #2 is nominally on 3/18. I don’t want to rush it though. I will let you know before spring break if I need to push it back. • Electromagnetism • Waves
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ISP209s10 Lecture 13 -2- Clicker question What will happen if you cut this magnet In half at the midpoint? A) You will get two smaller magnets, one with a North pole only and the other with a South pole only B) You will get two smaller magnets, each one having both a North and a South pole
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ISP209s10 Lecture 13 -3- Clicker question What will happen if you cut this magnet In half at the midpoint? A) You will get two smaller magnets, one with a North pole only and the other with a South pole only B) You will get two smaller magnets, each one having both a North and a South pole No isolated north or south pole (“monopole”) has ever been seen in nature or manufactured in the laboratory
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ISP209s10 Lecture 13 -4- Clicker question True or False. You can make your own magnet from Scratch with some wire and a battery to make electrical Current flow thru the wire. A)True B)False
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ISP209s10 Lecture 13 -5- Clicker question . A)True B)False Moving charge creates a magnetic field At the microscopic Level, “permanent” Magnets (e.g.,
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ISP209s10 Lecture 13 -6- • The earth’s gravitational field surrounds the earth; it would be there even if the moon wasn’t. • The existence of a field in a region of space means that if an appropriate object is in this region, it will experience a force. • An electric field will exert a force on a charge • a magnetic field will exert a force on a magnet or a moving charge. Force Fields: A disturbance of space
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ISP209s10 Lecture 13 -7- Electric Field example • If we move a test charge, q, in the vicinity of another direction) • Define: Electric field E = F/ q • Electric field is a vector. Its units are N/C or V/m (volts/meter). It points in the direction of the force.
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l13 - Today HW and Extra Credit due Thursday 8am Exam #2 is...

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