In an RLC series circuit at resonance, the voltages across the resistor and the inductor are 30 V and 40 V respectively. Determine the voltage across the capacitor.
A
50V
B
30V
C
70V
D
40V
Verified Correct Answer: D.
Physical Principles & Numerical Solution
At resonance, the inductive reactance is equal to the capacitive reactance. This means that the voltage across the inductor is also equal to the voltage across the capacitor.
Therefore, the voltage across the capacitor is 40 V.
Source: Myschool Past Questions Archive (Record #69383)