GATE ME 2016 Set 2 — Question 36

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NAT+2 / -0MediumLine, Surface & Volume IntegralsVector CalculusEngineering MathematicsConservative Vector Fields

Engineering Mathematics → Vector Calculus → Conservative Vector Fields

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Question

A scalar potential ϕ\phi has the following gradient: ϕ=yzi^+xzj^+xyk^\nabla\phi = yz\hat{i} + xz\hat{j} + xy\hat{k}. Consider the integral Cϕdr\int_C \nabla\phi \cdot d\mathbf{r} on the curve r=xi^+yj^+zk^\mathbf{r} = x\hat{i} + y\hat{j} + z\hat{k}.
The curve CC is parameterized as follows: {x=ty=t2z=3t2\begin{cases} x = t \\ y = t^2 \\ z = 3t^2 \end{cases} and 1t31 \leq t \leq 3.
The value of the integral is ________
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