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Home Q & A Board Science-Related Homework Help Physics
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Oasis Oasis
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11 years ago
A series RLC circuit contains a 125.0 ? resistor, a 35.0 ?F capacitor and a 70.0 mH inductor. The circuit is attached to a 60 Hz oscillator with a peak voltage of 55.0 V.

a) What is the peak current?

b) What is the phase angle?

c) What is the peak voltage across the capacitor?

Thanks for the help!
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#1
11 years ago
Your main formulas here are V(inductor) = I(XL), V(capacitor) = I (XC), V(resistor) = I R, and V(generator) = I Z overall.  That gives the magnitude.  The phase angle comes from the diagram for
Z, with R along the x axis, XL along the positive y axis, XC along the negative y axis, so the net
y component is XL-XC.  The hypotenuse is Z, and the angle it makes with R is the phase angle.

Good luck!
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