18 Questions
What is the peak value of an alternating voltage waveform represented by v = 200 sin (628.4t – 0.41) volts?
250 V
In an alternating voltage waveform v = 20 sin 157.1t volts, what is the frequency of the waveform?
100 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
What is the phase angle of an alternating voltage waveform represented by v = 200 sin (628.4t – 0.41) volts?
$450^\circ$
A waveform has a peak to peak value of 300V, calculate the waveform's rms value.
225.6 V
In an alternating voltage waveform v = 20 sin 157.1t volts, what is the maximum value of the waveform?
$20 , \text{V}$
What is the frequency of the generated emf when the rotational speed is 900 rev/minute?
30 Hz
What is the periodic time of the sinewave shown in the figure if its frequency is 5 kHz?
25 μs
What is the peak-to-peak value of the alternating voltage v=75 sin(200πt-0.25) volts?
150 V
If the rms value of an alternating voltage is 50 V, what is its maximum value?
100 V
What is the phase angle of the alternating voltage v=75 sin(200πt-0.25) volts?
-45 degrees
If the amplitude of an alternating voltage is 10V, what is its frequency if the periodic time is 100μs?
20 kHz
How many times is the minimum value of emf or current reached during one cycle of ac?
Once
What is the correct formula for calculating the period of a sine wave?
$Period = \frac{2\pi}{\text{Frequency}}$
Which term represents the time taken to complete one cycle of an alternating current?
Periodic time
What does the phase angle of a sine wave indicate?
The position of the wave at a given time
If the effective voltage of a sine wave is 150V, what is the peak voltage?
212V
What characteristic differentiates an AC wave from a DC wave in terms of comparison?
Effective value
Test your knowledge on phase relationship between two voltage waves and determining the instantaneous value of a waveform at a specific position. Questions cover topics such as wave phases, peak values, and waveform calculations.
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