The horizontal component of Earth’s magnetic field at a place is

PHYSICS · Subjective · CBSE · Physics · Magnetic Effects of Electric Current · Magnetic Effects of Electric Current

Problem

3.0\times10^{-5}\,\text{T}

. What magnitude of current must be sent through an infinitely long straight wire so that, at a point

2.0\,\text{cm}

from the wire, the magnetic field produced by the wire equals this Earth’s field? (Take

\mu_0 = 4\pi\times10^{-7}\,\text{T\,m\,A}^{-1}