CBSE Term 1#!#100% Exams me Puche Jaane Wale Sawaal

The freezing point of one molal NaCl solution assuming NaCl to be 100% dissociated in water is (molal depression constant= 1.86)

(A) Efficiency of a reversible ingine is 100% (maximum) when the temperature of sink is -273^(@)C . (R) Efficiency of engine eta=(T_(2)-T_(1))/(T_(2))

Current through an AC series L-C-R circuit is 2 A if operated at resonance frequency , and 1 A if operated at 50% less than resonant frequency . The current (in A) if the frequency is 100% more than the resonant frequency , is