1
GATE ECE 2008
MCQ (Single Correct Answer)
+2
-0.6
Consider points $$P$$ and $$Q$$ in $$xy-$$plane with $$P=(1,0)$$ and $$Q=(0,1).$$ The line integral $$2\int\limits_P^Q {\left( {x\,dx + y\,dy} \right)\,\,} $$ along the semicircle with the line segment $$PQ$$ as its diameter
A
is $$-1$$
B
is $$0$$
C
$$1$$
D
depends on the direction (clockwise (or) anti-clockwise) of the semi circle
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