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1.same current iis flowing in three infinitely long wires along positive x,y,z directions. the magnetic field at a point (0,0,a) would be what?? the ans is i(j^ -i^)/2 a. i dont understand how it is j^ -i^ . 2.an electreon is moving along positive x axis.a uniform electric field exists towards the negative y axis. what should be the direction of magnetic field of suitable magnitude so that the net force on the electron is zero?? ans: negative z axis. how??


1.same current iis flowing in three infinitely long wires along positive x,y,z   directions. the magnetic field at a point (0,0,a) would be what??
 the ans is i(j^ -i^)/2a.
 
i dont understand how it is j^ -i^ .
 
2.an electreon is moving along positive x axis.a uniform electric field exists towards the negative y axis. what should be the direction of magnetic field of suitable magnitude so that the net force on the electron is zero??
ans: negative z axis.
 
how??
 
 
 
               


Grade:10

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