Question

In an ac circuit, the current is given by i = 4 sin (100 πt + 30º) ampere. The current becomes maximum first time (after t = 0) at t equal to : [1] (1/200) sec [2] (1/300) sec [3] (1/50) sec [4] none of the these

Answer 1

Dear Student
$$\begin{gathered} when \\ i=4\sin (2\pi +30) \\ thenagaincurrentwillbemaximum \\ anditwillbe \\ when2\pi =100\pi t \\ meanst=1/50 \end{gathered}$$