Two long parallel wires 40 cm apart are carrying currents of 10 A and 20 A in the opposite direction.What is the magnitude of the magnetic field halfway between the wires?
A) 1.0 x 10-5 T
B) 2.0 x 10-5 T
C) 3.0 x 10-5 T
D) 4.0 x 10-5 T
Correct Answer:
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