Voltage and Current vs Time Graph - LCR Circuit The following graph shows the vo
ID: 1602659 • Letter: V
Question
Voltage and Current vs Time Graph - LCR Circuit
The following graph shows the voltage and current through a single circuit element. What is the frequency of the ac generator? V_p = 68.0 V, I_P = 2.90 A, t_1 = 0.0433 s. What is the average power dissipated in this element? The circuit element above is either a resistor, an inductor, or a capacitor. Use the graph and what you know of circuit elements to determine what type of element is shown in the graph. If it is a resistor, what is the value of its resistance? If it is an inductor, what is its inductance? If it is a capacitor, what is its capacitance?Explanation / Answer
as current leads votage phase angle is -90 degree
formula for average power dippated in this element is
P_avg = 1/2 * VP IP cos (-90)
= 1/2 * 68 ( 2.9) ( cos (-90)
=0
(c)
C= I/ V 2 pi f
number of voltage cycles in t1 = 0.0433 s is
f = 2.25/0.0433 = 51.96 Hz
C= 2.9/68 * 2pi ( 51.96)
=1.30 * 10^-4 F
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