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If an alternating voltage is represent...

If an alternating voltage is represented as v = 300 sin 600 t then the arms value of the voltage and the frequency are respectively :

A

141 V, 628 Hz

B

100 V, 50 Hz

C

100V,100 Hz

D

None of these

Text Solution

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The correct Answer is:
To solve the problem, we need to find the RMS (Root Mean Square) value of the voltage and the frequency from the given alternating voltage equation \( v = 300 \sin(600t) \). ### Step-by-Step Solution: 1. **Identify the Peak Voltage**: The given voltage equation is \( v = 300 \sin(600t) \). Here, the coefficient of the sine function (300) represents the peak voltage \( V_0 \). \[ V_0 = 300 \, \text{volts} \] 2. **Calculate the RMS Voltage**: The RMS value of an AC voltage is given by the formula: \[ V_{\text{RMS}} = \frac{V_0}{\sqrt{2}} \] Substituting the value of \( V_0 \): \[ V_{\text{RMS}} = \frac{300}{\sqrt{2}} \approx \frac{300}{1.414} \approx 212.16 \, \text{volts} \] 3. **Determine the Angular Frequency**: The angular frequency \( \omega \) is given in the equation as 600 rad/s. We know that: \[ \omega = 2\pi f \] Setting \( \omega = 600 \): \[ 600 = 2\pi f \] 4. **Calculate the Frequency**: Rearranging the equation to solve for \( f \): \[ f = \frac{600}{2\pi} \] Substituting the value of \( \pi \) (approximately 3.1416): \[ f \approx \frac{600}{2 \times 3.1416} \approx \frac{600}{6.2832} \approx 95.5 \, \text{hertz} \] 5. **Final Results**: The RMS value of the voltage is approximately \( 212.16 \, \text{volts} \) and the frequency is approximately \( 95.5 \, \text{hertz} \). ### Summary of Results: - RMS Voltage: \( 212.16 \, \text{volts} \) - Frequency: \( 95.5 \, \text{hertz} \)
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