IP An RLC circuit has a resistance R = 30 ft and an inductance L = 190 mH, and i

Question

IP An RLC circuit has a resistance R = 30 ft and an inductance L = 190 mH, and is connected to an ac generator with a frequency of 55 Hz. The phasor diagram for this circuit is shown in the fiaure(Fioure 1). Part A Find the impedance, Z for this circuit. Express your answer using two significant figures. Part B Find the capacitance, C, for this circuit. Express your answer using two significant figures. PartC If the value of C is decreased, will the impedance of the circuit increase, decrease, or stay the same?

Explanation / Answer

a)Z=R

z-impendance

R-resistance

at resonant frequency z=30

b)w=2*pi*f

where w-angular frequency

f -frequency

w=2*3.142*55

=345.62 rad/s

w=1/sqrt LC

Where L -Inductance

c-capacitance

345.62=1/sqrt 0.19*C

C=0.28 Faradays

c)increase

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