The equation of director circle of the circle \[{{x}^{2}}+{{y}^{2}}={{a}^{2}},\]is [BIT Ranchi 1990]

\[{{x}^{2}}+{{y}^{2}}=4{{a}^{2}}\]

\[{{x}^{2}}+{{y}^{2}}=\sqrt{2}{{a}^{2}}\]

\[{{x}^{2}}+{{y}^{2}}-2{{a}^{2}}=0\]

The equation of director circle of the circle \[{{x}^{2}}+{{y}^{2}}={{

1.	The equation of director circle of the circle \[{{x}^{2}}+{{y}^{2}}={{a}^{2}},\]is [BIT Ranchi 1990]
A.	\[{{x}^{2}}+{{y}^{2}}=4{{a}^{2}}\]
B.	\[{{x}^{2}}+{{y}^{2}}=\sqrt{2}{{a}^{2}}\]
C.	\[{{x}^{2}}+{{y}^{2}}-2{{a}^{2}}=0\]
D.	None of these
Answer» D. None of these

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The equation of director circle of the circle \[{{x}^{2}}+{{y}^{2}}={{a}^{2}},\]is [BIT Ranchi 1990]

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