The magnitude of the $x$ -component of a unit vector at the point (1,1) that is normal to equipotential lines of the potential function $\phi(r)=\frac{1}{r^{2}+4},$ where $r=\sqrt{x^{2}+y^{2}},$ is _____________(accurate to two decimal places).

Question ID - 155531 :-

The magnitude of the $x$ -component of a unit vector at the point (1,1) that is normal to equipotential lines of the potential function $\phi(r)=\frac{1}{r^{2}+4},$ where $r=\sqrt{x^{2}+y^{2}},$ is _____________(accurate to two decimal places).

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