[填空题]
A long pair of wires conducts 25.0 A of dc currec; o6h 5y:ljwsnt to, and from, an instrumenvmva+t)2*uvr nc e).am: h vj0t. If the insulated wires are of negligible diameter but are 2.8 mm apart, what is the magnetic field 10.00 cm from their midpoint, in their plane (Fig. Below)? Compare to the magnetic field of tmer) .a2:jvt vmnvhvc+u 0 )*ahe Earth.
$ \times10^{-6 }\;T$ The field of the wires is about % that of the Earth.(retain two decimal places)
