What are the magnetic field strength and direction at points 1 to 3 in the figur

Question

What are the magnetic field strength and direction at points 1 to 3 in the figure below in which I = 14 A, d = 1 cm, and D = 2 cm? a) What is the magnetic field strength and direction at point 1 due to the top wire? B due to top wire: b) What is the magnetic field strength and direction at point 1 due to the bottom wire? B due to bottom wire: c) What is the net magnetic field strength and direction at point 1? net B at point 1: d) What is the net magnetic field strength and direction at point 2? net B at point 2:

Explanation / Answer

1) B = ( 4pi x 10^-7 ) (14 )/ ( 2pi x 1 x 10^-2) = 28 x 10^-5 T = 2.8 x 10^-4 T , out of the page

2) B = ( 4pi x 10^-7 ) ( 14 ) / ( 2pi x 3 x 10^-2) = 9.33 x 10^ -5 T , in the paper

3) Net magnetic field at 1= ( 2.8x10^-4 - 0.933 x 10^-4) = 1.867 x 10^-4 T ( out of the paper)

4) B = ( 4pi x 10^-7 ) ( 2pi x 1x 10^-2 ) ( 28) = 56 x 10^-5 T into the page

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