engineering recuitment AAI JE Technical Mock Test 2020-21 Heat Transfer Conduction Heat Conduction Through Hollow and Composite Sphere
What will be the geometric radius of heat transfer for a hollow sphere of inner and outer radii r1 and r2?
1
\(\sqrt {{r_1}{r_2}} \)
2
\({r_2}{r_1}\)
3
\(\frac{{{r_2}}}{{{r_1}}}\)
4
\({r_2} - {r_1}\)