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Problem
Let C be the circle with centre at (1, 1) and radius = 1. If T is the circle centred at (0, y), passing through origin and touching the circle C externally, then the radius of T is equal to : [JEE(Main)-2014] (1)
1
2
\frac{1}{2}
2
1
(2)
1
4
\frac{1}{4}
4
1
(3)
3
2
\frac{\sqrt{3}}{\sqrt{2}}
2
3
(4)
3
2
\frac{\sqrt{3}}{2}
2
3
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