From the diagram above, if the potential difference across the resistor, capacitor and inductor are…

From the diagram above, if the potential difference across the resistor, capacitor and inductor are 80 v, 110 v, 40 v respectively, the effective potential difference is
  • A.
    116.3 V
  • B.
    50.0 V
  • C.
    230.0 V
  • D.
    106.3 V
Correct Answer: Option D
Explanation

V =
√ (v1 + v2)2 + VR2 
V =
√ (40 + 110)2 + 802 
V =
√ (-70)2 + 802 
=
√ 4900 + 6400 
=
√ 11300 
= 106.3v

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