HMT UNIT I one dimensional steady state heat conduction

What is steady state heat conduction?

• Heat flow that changes with time

• Heat flow that does not change with time

• Heat flow that changes with temperature     

• Heat flow that does not change with temperature

What is the general equation for steady state heat conduction in a bar with constant cross-sectional area?

• Q/A = k (dT/dx)

• Q/A = k (dx/dT)

• Q/A = T/k (dx/dT)

• Q/A = T/k (dT/dx)

What is the relationship between thermal conductivity, cross-sectional area, and temperature gradient in steady state heat conduction?

• k is directly proportional to A and inversely proportional to (dT/dx)

• k is inversely proportional to A and directly proportional to (dT/dx)

• k is directly proportional to A and (dT/dx)

• k is inversely proportional to A and (dT/dx)

What is the importance of knowing the rate of heat flow in a metal rod?

• It helps in determining the temperature distribution in the rod

• It helps in determining the thermal conductivity of the metal          

• It helps in determining the cross-sectional area of the rod

• It has no practical applications

A metal rod of length L and cross-sectional area A has a temperature gradient (dT/dx) from one end to the other. What is the rate of heat flow in the rod? 

• Q/t = kA(dT/dx)

• Q/t = kL(dT/dx)

• Q/t = kA(dx/dT)

• Q/t = kL(dx/dT)