We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
FOR MANAGERS AND OPERATORS 27
true with electricity. You can increase its capacity to do work either by increasing the volume of current (amperage) or by increasing the voltage. To perform a given amount of work with a low pressure (voltage) a large volume (amperage) is necessary, but if the voltage be high the same amount of work can be performed with much less volume of current. In fact, the number of horse power of work performed by electric current is represented by the voltage times the amperes, divided by 746.
Ohm. — Water in passing through a pipe encounters resistance, by reason of the rough sides of the pipe, as well as by reason of the internal resistance of the water itself. This resistance tends to retard the flow. Precisely the same is true with electricity. In passing through a wire electric current encounters resistance, and this resistance tends to retard the flow of current. It is measured in ohms, the definition of which is given elsewhere. The effect of resistance is to produce heat. In a water pipe the resistance increases as the volume of water passing through the pipe is increased, or as the pipe is made smaller in relation to the volume of water flowing. It decreases as the pipe is made larger with reference to the volume of water flowing. The same thing is true of current. Having a wire of given area, the resistance increases as the current flow becomes greater, and decreased as the current flow becomes less, or, having a given current flow the resistance increases as the diameter of the wire is made less or its length is increased, or decreases as the diameter of the wire is made greater or its length is decreased.
Watt. — Watt is the unit used to measure the amount of electrical energy expended — the amount of work actually performed. It is found by multiplying the voltage by the amperage, and is transformed into horse power by dividing by 746, since 746 w,atts equal one horse-power.
For example: If we have 10 amperes flowing at 110 volts, the amount of energy expended would be equal to 110 X 10 = 1100 watts, which, divided by 746= 1.47 h. p. If, on the other hand, we had 110 amperes flowing at 10 volts the result would be the same. But if we had 10 amperes flowing at 10,000 volts then we would have electrical energy expended (work performed) as follows: 10,000X10=100,000 watts -f 746 = 134 h. p.