Two long parallel wires are apart and carry currents of in opposite directions

PHYSICS · Single correct · CBSE · Physics · Magnetic Effects of Electric Current · Magnetic Effects of Electric Current

Problem

Two long parallel wires are

8\,\text{cm}

apart and carry currents of

20\,\text{A}

in opposite directions. Find the magnitude of the magnetic field at the point that lies midway between the wires. (a)

1.0 \times 10^{-4}\,\text{T}

(b)

4.0 \times 10^{-4}\,\text{T}

(c)

2.0 \times 10^{-4}\,\text{T}

(d)

5.0 \times 10^{-5}\,\text{T}