Equal currents are flowing in three infinitely long wires along the positive -, -

PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

Equal currents are flowing in three infinitely long wires along the positive

x

y

-, and

z

-directions. The magnetic field at the point

(0,0,-a)

would be, where

I

is the current in each wire,