COMEDK Exam 2019 Solved Paper

The L−C−R circuit in series combination and phasor diagram is given belowAccording to the question,
Potential difference across resistor, VR=40V
Potential difference across inductor, VL=60V
Potential difference across capacitor, VC=30V
Magnitude of potential difference supplied is given by
V‌=√VR2+(VL−VC)2=√402+(60−30)2
‌=√(40)2+(30)2=√2500
‌=50V