In an LCR circuit, at resonance

Options

A. the impedence is maximum
B. the current leads the voltage by `pi//2`
C. the current and voltage are in phase
D. the current is minimum

Answer

C

Explanation

In an LCR circuit , the phase difference `(phi)` between current and voltage is
`tan phi = ( 0 ) or phi = tan^(-1) (0) = 0^(@)`
Thus the current and voltage are in phase .
The current is maximum and the impedance is minimum at resonance in an LCR circuit .