Physics
Card Set Information
Author:
cregister
ID:
41416
Filename:
Physics
Updated:
2010-10-17 00:32:13
Tags:
Ohm\'s Law
Folders:
Description:
Ohm's Law
Show Answers:
What is Ohm's Law?
describes the relationship between voltage, amperage and resistance in a simple electrical circuit.
V or E
voltage - the amount of potential energy
Measured in volts
if resistance remains the same...
the current flow goes up or down if voltage goes up or down
when resistance goes up...
the current goes down (so long as the voltage remains the same)
when resistance goes down...
current goes up (if the voltage is still the same.)
3 Truths of Ohm's Law
* if resistance remains the same, the current flow goes up or down if voltage goes up or down
* when resistance goes up, the current goes down so long as the voltage remains the same
* and when resistance goes down, current goes up if the voltage is still the same.
I
current
measured in Amps (A)
R
resistance
measured in Ohms (
)
P
Power
measured in watts (W)