Correct Answer - D
d) `e=sqrt(e_(1)^(2)+e_(2)^(2))sin(omegat+phi)`
Where, `cosphi = (e_(1))/(sqrt(e_(1)^(2)+e_(2)^(2)))` and `sinphi = (e_(2))/(sqrt(e_(1)^(2)+e_(2)^(2)))`
i.e., `e_(0) = sqrt(e_(1)^(2)+e_(2)^(2))`
or `e_(rms) = sqrt(e_(1)^(2)+e_(2)^(2))/(sqrt(2))`