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 externally, then the radius of T is equal to
1/2
1/4
D.
1/4
Let the coordinate of the centre of T be (0, K)
Distance between their centre
So, the radius of circle T is k i.e, 1/4
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