[填空题]
Two long straight parallel wires are 15 cm apad+ qfc rjuyquzb7k 3o:;b s1)5rt. 6// 8llj/xq2d:j onsmchob; kWire A carries 2.0 A current. Wire B’s cm/:co /lb 2knjq;djlsx6 h/8ourrent is 4.0 A in the same direction.
(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)
