#"for green wire :"#
#vec B_X=(2*K*I_1)/(d/2)=(4*K*I_1)/d#
#vec B_X=(8K)/d#
#"for red wire :"#
#vec B_O=(2*K*I_2)/(d/2)=(2*K*1)/(d/2)#
#vec B_O=(4K)/d#
#vec B_X > vec B_O#
#B=(8K)/d-(4K)/d=#
#B=(4K)/d#
#"current " I_1="2A switched off :"#
#"The net magnetic field is :"- vec B#