First slide

Phasors and Phasor Diagrams

Question

In a series resonant circuit, the AC voltage across resistance R, inductance L and capacitance C are 5 V 10 V and 10 V respectively. The AC voltage applied to the circuit is

Easy

A

20 V
B

10 V
C

5 V
D

25 V

Solution

$V = \sqrt{V_{R}^{2} + {(V_{L} - V_{C})}^{2}} = \sqrt{(5)^{2} + (10 - 10)^{2}} = 5 V$

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