Thermal resistance (R) may be defined as the:
a. Quantity of heat flow per unit time (in Watts)
b. Ability of a material of uniform thickness to transmit heat (W/m°C)
c. Heat transfer through a one-metre cross-sectional area of a particular material with defined surfaces (W/m2°C)
d. Heat flow per unit time through one square metre of a material, when exposed to a differential temperature of 1 degree Celsius (W/m2°C)
e. Reciprocal of thermal conductance (m2°C/W)
Answer: e