Under what condition does a concave mirro has lateral magnification of +1

Under what condition does a junction diode work as open switch?

Under what conditions a concave lens can behave as a converging lens?

under what condition does a biconvex lens of glass having a certain refractive index act as a plane glass sheet,when immersed in a liquid?

Under what conditions is work said to be done?

Under what condition is the relation S= ut correct?

Under what condition is E_(cell)=0 and Delta_rG=0 ?