AP EAMCET Engineering 22 Sep 2020 Shift 1 Paper

Phasor diagram of L−C−R series circuit is shown in the following figure,For phasor diagram, it is clear that if VL>VC, then voltage V leads φ angle from current.
where, φ=tan−1(‌

VL−VC

VR

)=tan−1(‌

XL−XC

R

)
Hence, voltage leads the current with angle φ when
VL>VC⇒LXL>LXC⇒XL>XC