Subject: RE: Digest for Loopfram-@topica.com, issue 897
Author: Jesse Open
Date: Aug 30, 2002, 1:04 PM
Post ID: 1710914576
That is not how Ohm's law works. As the Voltage source DROPS into the
fixed resistance the CURRENT (Amps) will DROP in direct proportion. It
takes 1 Volt to push 1 Ampere of Ccurrent through 1 Ohm of resistance.
A battery that drops voltage when placed across a given resistance will
cause less current to flow.
However a DC motor does not always look like a fixed resistance to the
battery. At speeds below the design speed ,the motor will overheat ,not
because of increased current draw but because it is saturating each
armature coil and building up HEAT.
psabr-@aol.com wrote:
| Actually, it make make sense but not directly. If you had used a battery with too low a capacity, the voltage may have dropped under load. When the voltage drops over a fixed resistance, the amperage increases to keep the ratio constant (Ohm's law). It is not the voltage that causes the problem it is the amperage.
|
I take mine anywhere without worrying WITHOUT disc brakes ! But then
again I never worried on ANY bike ,even the BRIT bikes with LUCAS
electrics !And they NEVER let me down.At least since 1966 !
1969 V700 Euro
1972 Eldo LAPD
1993 Cal III Fuel Injection
2003 EV NEXT YEAR !!