Two long parallel wires carry currents of 10 a in opposite directions. they are separated by 40 cm. what is the magnitude of the magnetic field in the plane of the wires at a point that is 20 cm from one wire and 60 cm from the other? (μ 0 = 4π × 10-7 t · m/a)

Why there is no inductive reactance in dc circuits

Aphysical change is a change in the size, shape,, or stafe of matter true or false

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve