A. When Volts and OHMS are known:
| Amperes = |
Volts
---------
OHMS |
of I = |
E
-----
R |
Example: Find the current of a 120 volt circuit with a resistance of 60 OHMS.
| I = |
E
-----
R |
= |
120
------
60 |
= 2 Amperes |
B. When Watts and Volts are known:
| Amperes = |
Watts
----------
Volts |
or I = |
P
------
E |
Example: A 120 Volt Circuit has a 1440 Watt Load. Determine the current.
| I = |
P
---------
E |
= |
1440
---------
120 |
= 12 Amperes |
C. When OHMS and Watts are known:
Example: A circuit consumes 625 watts through a 12.75 OHM resistor. Determine the current.
Notes:
A. One Electrical Horsepower = 746 watts. Electric Motors are rated in horsepower.
B. One kilowatt = 1000 watts. Generators are rated in kilowatts.
|
