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# exam3review - Physics 2102 Jonathan Dowling Review Session...

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Review Session : Midterm 3 Physics 2102 Jonathan Dowling

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Checkpoints/Questions Checkpoints/Questions Magnetic field? Force on each wire due to currents in the other wires? Magnitude of ∫B∙ds?

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The current in wires A,B,D is out of the page, current in C is into the page. Each wire produces a circular field line going through P, and the direction of the magnetic field for each is given by the right hand rule. So, the circles centers in A,B,D are counterclockwise, the circle centered at C is clockwise. When you draw the arrows at the point P, the fields from B and C are pointing in the same direction (up and left).
A length of wire is formed into a closed circuit with radii a and b , as shown in the Figure, and carries a current i . (a) What are the magnitude and direction of B at point P ? (b) Find the magnetic dipole moment of the circuit. R i B π φ μ 4 0 = μ =NiA

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Induction and Inductance Induction and Inductance Faraday’s law: or Inductance: L=N Φ /I – For a solenoid: L=

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## This note was uploaded on 11/18/2011 for the course PHYSICS 2102 taught by Professor Dowling during the Fall '10 term at LSU.

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exam3review - Physics 2102 Jonathan Dowling Review Session...

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