in the figure, the two long straight wires are separated by a distance of d=0.60
ID: 2011779 • Letter: I
Question
in the figure, the two long straight wires are separated by a distance of d=0.60m . The currents are I1=7.0A
the right in the upper wire and I2=8.0Ato the left in the lower wire. What is the magnitude and direction of the magnetic field at point P , that is a distance d/2=0.30m below the lower wire? (Note: ) 0=4 x 10-7 T*m/a
A) The magnitude of the magnetic field is __________________T
to the right on the plane of the screen to the left on the plane of the screen upward on the plane of the screen downward on the plane of the screen into the plane of the screen out of the plane of the screen
Explanation / Answer
PART A ;
B = [ 0/2 ] [ - I1 / r1 + I2/r2 ] ;
B = [ 0/2 ] [ 8 / 0.3 - 7/( 0.3+0.6) ] ; + ve maens out of the plane ;
B = 3.77e -6 T <----------ans <-----------magnitude
since the answer is positive ,
the field is out of the page , <---------parT B ( or out of plane of screen )
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