Critical radius of a hollow cylinder is defined as _______.

1.	Critical radius of a hollow cylinder is defined as _______.
A.	Outer radius which gives maximum heat flow
B.	Outer radius which gives minimum heat flow
C.	Inner radius which gives minimum heat flow
D.	Inner radius which gives maximum heat flow
Answer» B. Outer radius which gives minimum heat flow

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Critical radius of a hollow cylinder is defined as _______.

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