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In a steady state of heat flow through conduction, the thermal current H (i.e. rate of flow of heat) through a bar of cross-section area 'A' is given byH = KA∆T∆l\nwhere,∆T∆lis temperature gradient along the bar and 'K' is co-efficient of thermal conductivity of the material of bar.In the above expression the term ∆lKA is known as thermal resistance offered by a section of bar having length ∆l. 📲 PW App Link - https://bit.ly/YTAI_PWAP 🌐 PW Website - https://www.pw.live/