A very thin electrical heater is attached on a metal plate with thermal conductivity K. Both sides of the system are exposed to air. The electrical heater dissipates qe and

maintains the uniform temperature at Te. 1. Sketch the equivalent thermal circuit of the system and express all resistance in terms of relevant properties on the circuit. Add directions of heat fluxes (qe, q1, and q2) on the circuit. 2. Obtain an expression of heat flux dissipated from the heater (qe) in terms of Te, T oo, h, R t,c, Land K.