[填空题]
Two long straight para 9 z bfa+2fgujk d 5j7/:6rs)kddnrq,6tg kgv0llel wie7;+issbp(co t1u. -xk+jtk j res are 15 cm apart. Wire A carries 2.0 A current. Wire B’s current is 4.0 A in the same direction.
kc t+u1bx(pjk 7s+i-j.ose;t (a) Determine the magnetic field magnitude due to wire A at the position of wire B. $\approx$ $ \times10^{-6 }\;T$(retain one decimal places)
(b) Determine the magnetic field due to wire B at the position of wire A. $\approx$ $ \times10^{-6 }\;T$(retain one decimal places)
(c) Are these two magnetic fields equal and opposite? Why or why not?
(d) Determine the force on wire A due to wire B, and the force on wire B due to wire A. Are these two forces equal and opposite? Why or why not? $\approx$ $ \times10^{-5 }\;N/m$(retain one decimal places)
