Can you attach a pic of the illustration that accompanied this question?DunceKirchhoff said:A 50 Hz ac three phase supply has a peak voltage of 100 V. Calculate the instantaneous voltage of each phase at a time of 7.5 ms.
The formula for calculating instantaneous voltage of a 50 Hz 3-phase supply is V = Vpeak * sin(2πft), where Vpeak is the peak voltage, f is the frequency in Hertz (Hz), and t is the time in seconds.
The peak voltage of a 50 Hz 3-phase supply with a 100 V RMS voltage is approximately 141.4 V. This can be calculated using the formula Vpeak = VRMS * √2, where VRMS is the root mean square voltage.
To convert 50 Hz to radians per second, multiply the frequency in Hertz by 2π. In this case, 50 Hz would be equal to 314.16 radians per second (50 Hz * 2π = 314.16 rad/s).
A 3-phase supply is used in many industrial and commercial applications because it provides a more efficient and balanced distribution of power compared to a single-phase supply. It also allows for higher power output and less voltage drop over long distances.
The instantaneous voltage of a 50 Hz 3-phase supply can be measured using an oscilloscope. This device allows you to view the voltage waveform and calculate the instantaneous voltage at any given time. Alternatively, you can also use a digital multimeter to measure the peak voltage and calculate the instantaneous voltage using the formula mentioned in the first question.