Point P is midway between two long, straight, parallelwires that run east west i

Question

Point P is midway between two long, straight, parallelwires that run east west in a horizontal plane. The distancebetween the wires is 0.8 cm. Each wirecarries a current of 0.8 A toward theeast. (a) Find the magnitude and direction of themagnetic field at point P. in T
(b) Repeat the question if the current in the wire on the southside runs toward the west instead. in T (a) Find the magnitude and direction of themagnetic field at point P. in T
(b) Repeat the question if the current in the wire on the southside runs toward the west instead. in T

Explanation / Answer

(a) Find the magnitude and direction of themagnetic field at point P. in T (b) Repeat the question if the current in thewire on the south side runs toward the west instead. in T
at P
B=2*0i/2[100*i/0.4]=2*2*10-7*100*0.8/0.4=8*10-5T
the direction will be in such away to attract each other.
b)
B=0
because when they carry currents in the opposite direction theyrepel each other.
as the point under consideraton is mid point the magneticfield will be equal and opposite in direction.

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