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.
The time constant is also used to characterize the frequency response of various signal processing systems â magnetic tapes, radio transmitters and receivers, record cutting and replay equipment, and digital filters â which can be modeled or approximated by first-order LTI systems.he time constant is the main characteristic unit of a first-order LTI (linear time-invariant) system.