Series LCRAC Circuit
 
 
- Back to the original problem:   the loop equation gives:
- Here all unknowns, (im,f) , must be found from the loop eqn; the initial conditions have been taken care of by taking the emf to be: e = em sinwt. 
- To solve this problem graphically, first write down expressions for the voltages across R,C, and L and then plot the appropriate phasor diagram.