In the AC circuit shown,
`E=E_(0)sin(omegat+phi)andi=i_(0)sin(omegat+phi+pi/4)`.
Then, the box contains

Options

A. Only C
B. L and R in series
C. C and R in series or L, C and R in series
D. Only R

Answer

C

Explanation

As current leads by `pi/4`, so circuit must be more capacitive them inductive. Hence, it is either a C-R combination or L-C-R combination.