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?
Attached Figure / Diagram
A
116.3 V
B
50.0 V
C
230.0 V
D
106.3 V
Verified Correct Answer: D.
Physical Principles & Numerical Solution
V = \sqrt \({(v_l - v_c)}^2 + V^2R\)
V =\sqrt \({(40 - 110)}^2 + 80^2\)
V = \sqrt \({-70}^2 + 80^2\)
=\sqrt 4900 + 6400
=\sqrt 11300
= 106.3v
Source: WAEC / JAMB / NECO Classroom Archive (Record #14505)