Answer Posted / t e rao

sai phani kumar answer is correct.
Current flow will be same in all the elements. so
calculation should be done with reference to current.
Voltage across resistor Vr= 40+j0
Voltage across inductor Vl= 0+J70 (Since volage leads the
current by 90 degress)
Voltage across capacitor Vc= 0-J100 (since voltage lags the
current by 90 degress)

Total voltage = Vector sum of Vr + Vl + Vc
= 40+j0 + 0+J70 + 0-J100
= 40 - j30
Magnitude of voltage = 40-j30 = 50Voltage (with 38.6deg lag
to the current)

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