The following table gives the variation of periodic current over a period.
| t sec | 0 | T/6 | T/3 | T/2 | 2T/3 | 5T/6 | T |
| A amp | 1.98 | 1.30 | 1.05 | 1.30 | -0.88 | -0.25 | 1098 |
Show that there is a direct current part of 0.75 amp in the variable current and obtain the amplitude of the first harmonic.
Answer:-
