Motion picture projection; an elementary text-book (1921)

Page scan 00033 from Motion picture projection; an elementary text-book

Record Details:

Title:
Motion picture projection; an elementary text-book
Date:
1921
Publisher:
New York, Theatre Supply Co.
Volume:
Motion picture projection; an elementary text-book
Leaf #:
00033
Language:
English
Collection:
Books
Format:
Books
Contributor:
University of California Libraries
Sponsor:
MSN
Coordinator:
Media History Digital Library
Date Added:
July 19, 2022
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MOTION PICTURE PROJECTION Electric Motive Force Resistance = Current For Instance, suppose we have a line voltage of 100 and are using 20 amperes at arc lamp, then by dividing the 100 by 20 we would get the amount of resistance we have In our circuit 20 ) 100 (5 100 to we would have 5 ohms resistance in our circuit FOEMULA 8 To find the voltage of a circuit, multiply the amount of amperes drawn by the amount of resistance, or Electric Motive Force = Amperes Times Resistance For example: If we had 20 amperes at arc and our circuit was offering 5 ohms resistance, then by multiplying 20 by 6 we would get our voltage. 20 amperes 0 ohms 100 volts To find Volt*. Multiply number of Amperes by amount of Resistance. To find Rffiftance. Divide Voltage by Amperage. To find Amperage. Divide Voltage by Resistance. To find Watt*. Multiply Voltage by Amperage. To find Amp*. Divide Watts by Volts. To find Volt*. Divide Watts by Amperage.