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TN XII Math
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Objective type Questions and Answers
The differential equation of all circles with centre at the origin is
\[\begin{array}{1 1}(1)x dy+y dx=0&(2)x dy-y dx=0\\(3)x dx+y dy=0&(4)x dx-y dy=0\end{array}\]
tnstate
class12
bookproblem
p238
objective
q87
modelpaper
jun-2007
mar-2009
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asked
May 23, 2013
by
poojasapani_1
edited
May 21, 2014
by
meena.p
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1 Answer
The equation of the family of circles with center at the origin is $x^2+y^2=a^2$
$2x+2y . \large\frac{dy}{dx} $$=0$
$x+ y . \large\frac{dy}{dx} $$=0$
$x.dx +y.dy =0$
Hence 3 is the correct answer.
answered
May 21, 2014
by
meena.p
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