Two parallel wires, each carrying a current of I = 1.9 A, are shown in the figur

Question

Two parallel wires, each carrying a current of I = 1.9 A, are shown in the figure, where d = 5.0 cm. The current in wire 1 is in the opposite direction of wire 2. Find the direction and magnitude of the net magnetic field at points A, B, and C.

Point A Point B Point C Magnitude µT µT µT Direction ---Select--- right left top bottom into the page out of the page no direction ---Select--- right left top bottom into the page out of the page no direction ---Select--- right left top bottom into the page out of the page no direction

Explanation / Answer

B = 2k*I/d

at point A, B = -2k*1.9/0.05 + 2k*1.9/3*0.05 = -5.06 *10^-6 T [ -ve sign for B into the field, from the right hanf corckscew rule]
at point B, B = 2*2K*1.9/0.05 = 0.0000152 T (OUT OF THE PAGE)
at point C, B = -5.06*10^-6 T ( into the page) (from symmetry)

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