Question

An LR circuit can be used as a "phase shifter." Assume that an "input" source voltage...

An LR circuit can be used as a "phase shifter." Assume that an "input" source voltage V=V0sin(2πft+ϕ) is connected across a series combination of an inductor L = 54 mH and resistor R. The "output" of this circuit is taken across the resistor.

If V_0 = 27 V and f = 105 Hz , determine the value of R so that the output voltage VR lags the input voltage V by 30 ∘.

Express your answer using two significant figures.
R=

  

 Ω

Compare (as a ratio) the peak output voltage with V0.

Express your answer using two significant figures.
Voutput/V_0 =

  
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