Homework Statement
A uniform spherical charge density of radius R is centred at origin O. A spherical cavity of radius r and centre P is made. OP = D = R-r. If the electric field inside the cavity at position r is E(r), the correct statement is:
1)E is uniform, its magnitude is independent of r...
Is it possible for efficiency of R to be more than the backwards running efficiency of
I for any engines I and R? Because in that case, net heat would flow from the sink to the source ( I think) which violates the second law of thermodynamics even though Carnot's theorem implies that R should be...
Homework Statement
Carnot theorem states that no engine working between two temperatures T1 of source and T2 of sink can have a greater efficiency than that of the Carnot engine.
Second law of thermodynamics:it is impossible for a self acting machine to transfer heat from a body at a higher...