Newnes Circuit Calculations Pocket Book

5 Time

5.1 Introduction

Time is one of the parameters in equations relating to a.c. voltages

which will be discussed in Chapter 6.

By definition an alternating voltage changes from one level to

another level in a given time, and often it is necessary to calculate

this time interval. The time can be long in counter circuits, for

example, but in most circuits it is very short, where a second is

considered to be a very long time! The unit of time is the second, s,

and the aim is to show the submultiples used and to show the

conversion of one unit into another.

5.2 Units used

The main units are the following:

1 The second, s

2 The millisecond,