[问答题]
Determine the magnetic field midway b)2krq x**iiv o73lmoegq00cl w5yb9 between two lo-/f rglj1wq4g ng straight wires 2.0 cm apart in terms of the current I /l j4g1qwfr-gin one when the other carries 15 A. Assume these currents are
(a) in the same direction,
(b) in opposite directions.
