State a condition for an echo to be heard.

State the condition in which the terminal voltage of a secondary cell is equal to its emf

State a condition under which a bimolecular reaction is kinetically first order reaction.

State the condition in which the terminal voltage of a secondary cell is equal to emf.

Solve (log_(sin x)2)(log_(sin^(2)x)a)=-1 stating any condition on a' that may be required for the existence of the solution.

A series LCR circuit is connected to a source having voltage v=v_(m) sin omegat .Derive the expression for the instantaneous current I and its phase relationship to the applied voltage. Obtain the condition for resonance to occur.Define 'power factor'.State the conditions under which it is maximum

A series LCR circuit is connected to a source having voltage v=v_(m) sin omegat.Derive the expression for the instantaneous current I and its phase relationship to the applied voltage. Obtain the condition for resonance to occur.Define 'power factor'.State the conditions under which it is minimum.

State the conditions under which a force does no work.

State the necessary conditions for a satellite to appear stationary.

State the essential conditions for two light waves to be cohrent.