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# OL PH 223 32: 4-6

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## Richard Datwyler

on 4 March 2016

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#### Transcript of OL PH 223 32: 4-6

Lets consider a long straight wire with current I.
Recall the cross product produces

Set up the coil.
find the cross product
the 'r'
and direction
putting that into the Bio-Savart law gives
B = .3 T
5 cm
5 cm
Find the line integral on all three lines, in directions indicated
If the value of the line integral of B around the square is 3.77 x 10 Tm what is I ?
I
I = 2.0 A
I = 6.0 A
I = 3.0 A
-6
3
3
1
2
4
A 2.0 cm diameter, 10 cm long solenoid is tightly wound with one layer of wire. A 2.5 A current through the wire generates a 3.0 mT magnetic field inside the solenoid. What is the diameter of the wire in mm?
0 Tm
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