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# Phase Relationship and Waveform Peak Value Quiz

Created by
@CuteCrocus

## Questions and Answers

### What is the peak value of an alternating voltage waveform represented by v = 200 sin (628.4t – 0.41) volts?

• 100 V
• 300 V
• 250 V (correct)
• 150 V
• ### In an alternating voltage waveform v = 20 sin 157.1t volts, what is the frequency of the waveform?

• 100 Hz (correct)
• 157.1 Hz
• 50 Hz
• 200 Hz
• ### For an alternating voltage waveform v = 200 sin (628.4t – 0.41) volts, what is the periodic time of the waveform?

• 0.08 sec (correct)
• 0.02 sec
• 0.06 sec
• 0.04 sec
• ### What is the phase angle of an alternating voltage waveform represented by v = 200 sin (628.4t – 0.41) volts?

<p>$450^\circ$</p> Signup and view all the answers

### A waveform has a peak to peak value of 300V, calculate the waveform's rms value.

<p>225.6 V</p> Signup and view all the answers

### In an alternating voltage waveform v = 20 sin 157.1t volts, what is the maximum value of the waveform?

<p>$20 , \text{V}$</p> Signup and view all the answers

### What is the frequency of the generated emf when the rotational speed is 900 rev/minute?

<p>30 Hz</p> Signup and view all the answers

### What is the periodic time of the sinewave shown in the figure if its frequency is 5 kHz?

<p>25 μs</p> Signup and view all the answers

### What is the peak-to-peak value of the alternating voltage v=75 sin(200πt-0.25) volts?

<p>150 V</p> Signup and view all the answers

### If the rms value of an alternating voltage is 50 V, what is its maximum value?

<p>100 V</p> Signup and view all the answers

### What is the phase angle of the alternating voltage v=75 sin(200πt-0.25) volts?

<p>-45 degrees</p> Signup and view all the answers

### If the amplitude of an alternating voltage is 10V, what is its frequency if the periodic time is 100μs?

<p>20 kHz</p> Signup and view all the answers

### How many times is the minimum value of emf or current reached during one cycle of ac?

<p>Once</p> Signup and view all the answers

### What is the correct formula for calculating the period of a sine wave?

<p>$Period = \frac{2\pi}{\text{Frequency}}$</p> Signup and view all the answers

### Which term represents the time taken to complete one cycle of an alternating current?

<p>Periodic time</p> Signup and view all the answers

### What does the phase angle of a sine wave indicate?

<p>The position of the wave at a given time</p> Signup and view all the answers

### If the effective voltage of a sine wave is 150V, what is the peak voltage?

<p>212V</p> Signup and view all the answers

### What characteristic differentiates an AC wave from a DC wave in terms of comparison?

<p>Effective value</p> Signup and view all the answers

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