In 1919, the 18th Amendment to the U.S. Constitution, which prohibited the sale and manufacture of alcohol, was ratified. It went into effect on January 16, 1920âbeginning the era known as Prohibition.
Because time constant calculations are important, and often needed, it is better to make the definition of the time constant (T) in a CR circuit: THE TIME TAKEN FOR THE VOLTAGE ACROSS A CAPACITOR TO INCREASE BY 63.2% OF THE DIFFERENCE BETWEEN ITS PRESENT AND FINAL VALUES.
If an oscilloscope were connected to the body, the phase angle appears as a small delay between the voltage waveform and the current waveform. The period of each wave at 50 kilohertz is 20 microseconds. If, for example, the time delay is ten percent of the period, then the time delay is 2 microseconds.