anmol tyagi
Last Activity: 7 Years ago
For no current flow between C and D (Qt)AC=(Qt)CB
Þ K1A(θA−θC)l = K2A(θC−θB)l
Þ θA−θCθC−θB = K2K1 ...(i) Also (Qt)AD=(Qt)DB
ÞK3A(θA−θD)l = K4A(θD−θB)l
ÞθA−θDθD−θB = K4K3 ...(ii) It is given that θC=θD,
hence from equation (i) and (ii) we get K2K1=K4K3
Þ K1K4 = K2K3K1K4 = K2K3K1K4=K2K3