Question #07f44

1 Answer
ali ergin
Apr 30, 2016

#"The net magnetic field at E:"- vec B#

Explanation:

enter image source here

#"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#

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