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Lecture: 19 (iq17)

1. B at O of a circular arc Clicker 17-3

2. B due to a long wire segment:Integration. Clicker 17-3

o Symmetric case (textbook example)

o Long wire approximation

o Semi-longwire clicker

3. The three RHRs Clicker 17-4

4. Comments on Ch18-h2 003-004. Line segments + a circular arc.

a. Superposition principle.

b. The part of B at P contributed by a semi-long wire

5. B along z due to a circular ring: Magnetic dipole moment of a loop. clicker 18-2.

Added meaning to RHR3 -- current loop is equivalent to a magnetic dipole.

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