A telephonic cable at a place has four long straight horizontal wires carrying a current of
Channel: Doubtnut
Date: 2020-08-02

A telephonic cable at a place has four long straight horizontal wires carrying a current of `1.0amp.` in the same direction east to west. The earth's magnetic field at the place is `0.39G` and the angle of dip is `35^@`. The magnetic declination is almost zero. What are the resultant magnetic fields at points `4.0cm` below and above the cable?