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Given Vs = 81 volts at zero phaseR = 22 ohmsL = 3.7 mHC = 0.6 microfaradsFrequency, F= 1000 HzCalculate the phase of the phasor current I in radians.Choose a value of phase between -pi and +pi

Question

Given Vs = 81 volts at zero phaseR = 22 ohmsL = 3.7 mHC = 0.6 microfaradsFrequency, F= 1000 HzCalculate the phase of the phasor current I in radians.Choose a value of phase between -pi and +pi

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Solution

Given Vs = 81 volts at zero phase

R = 22 ohms

L = 3.7 mH

C = 0.6 microfarads

Frequency, F= 1000 Hz

Calculate the phase of the phasor current I in radians.

Choose a value of phase between -pi and +pi.

The phase of the phasor current can be calculated using the formula:

θ = arctan((Xl - Xc) / R)

where Xl is the inductive reactance, Xc is the capacitive reactance, and R is the resistance.

The inductive reactance (Xl) is given by:

Xl = 2πFL

The capacitive reactance (Xc) is given by:

Xc = 1 / (2πFC)

Let's calculate the inductive reactance:

Xl = 2π * 1000 * 3.7 * 10^-3 = 7.34 ohms

Now, let's calculate the capacitive reactance:

Xc = 1 / (2π * 1000 * 0.6 * 10^-6) = 265.26 ohms

Now, let's calculate the phase:

θ = arctan((7.34 - 265.26) / 22) = arctan(-11.72)

The arctan function returns a value in the range -pi/2 to pi/2. Since the argument is negative, the phase is in the second or third quadrant. Because the current lags the voltage in a series RLC circuit, the phase is in the second quadrant.

Therefore, the phase of the phasor current (I) is approximately -1.41 radians.

This problem has been solved

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