1) the two wires shown carry currents of 4.0 amps in the directions shown. Find
ID: 1289695 • Letter: 1
Question
1) the two wires shown carry currents of 4.0 amps in the directions shown. Find the net magnetic field at the point P
a) 17.3 muT
b) 20.0 muT
c) 25.9 muT
d) 30.0 muT
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2) the two wires shown carry currents of 4.0 A and 6.0 A in the directions shown. Find the net magnetic field at the point P
a) 4 muT into page
b) 6 muT out of page
c) 2 muT into page
D) 12 muT into page
Explanation / Answer
B1 at P = uoi/2PIR
B1 = 4pi e-7 * 4/(2pi * 0.08)
B1 = 10 uT
B2 = 4pi e-7 * 4/( 2pi * 0.08 )
B2 = 10 uT
as these act at 60 deg
BneT^2 = 10^2 +10^2 + 2*10*10 *cos 60
Bnet = 17 uT
option A it is
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option C
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