Published by:
CGP EDU Academic Team
Published on: August 13, 2026
Let 
and 
Then the locus of center of a variable circle 
which touches 
internally and 
externally always passes through the points:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
c JEE Main 2021
given circle are touching internally
Let a veriable circle with centre 
and radius 
and 
Locus of 
is an ellipse with foci at 
and 
and length of major axis is 
,
centre is at 
and 
if 
ellipse
which is satisfied by 
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