Aerospace Engineering > GATE 2018 > Vector Calculus
The magnitude of the x-component of a unit vector at the point (1, 1) that is normal to equi-potential lines of the potential function φ(r)=1/(r2+4), where r=√(x2+y2) is ________ (accurate to two decimal places).
Correct : 0.68 to 0.73
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