The instantaneous value of current and emf in an AC circuit are $\text{I=}\frac{\text{1}}{\sqrt{\text{2}}}\text{\hspace{0.17em}sin\hspace{0.17em}314t}$  amp and  $\text{E =\hspace{0.17em}}\sqrt{\text{2}}\text{sin}\left(\text{314t-}\frac{\text{π}}{\text{6}}\right)\text{V,}$ respectively. The phase difference between E and I (with respect to I) will be