# Magnetic field at the focus of an ellipse!

Electricity and Magnetism Level 5

An elliptical wire with semi major axis of length $$8 \text{m}$$ and semi minor axis of length $$1 \text{m}$$ contains a current of $$10^{7}A$$.If the magnetic field at one of it's focus is of the form $$k\pi\text{ Tesla}$$.

Find $$k^{2}$$.

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