Question
Nonnuclear submarines use batteries for power when submerged. (a) Find the magnetic field 50.0 cm from a straight wire carrying 1200 A from the batteries to the drive mechanism of a submarine. (b) What is the field if the wires to and from the drive mechanism are side by side? (c) Discuss the effects this could have for a compass on the submarine that is not shielded.
1. $4.80 \times 10^{-4} \textrm{ T}$
2. None, since the field directions from each wire are opposite.
3. If wires to and from the batteries are side-by-side, there will be no effect on a compass.
Solution Video