# Ohms/KOhms/MOhms Plese explain it to me.

Discussion in 'Electronic Repair' started by Red, Sep 3, 2003.

1. ### RedGuest

I know Ohms is resistance. What I am trying to figure out is the
relationship between an Ohm, a KOhm and a MOhm at the same Wattage.

How many of one does it take to make one of the others?

Is 334KOhms the same as .334MOhms at the same wattage? If so then how many
Ohms is that?

If I check resistance of a 1 MOhm Linear-Taper Potentiometer (500VDC, 0.5W)
with my DMM It starts out with a reading of 01.5 Ohms, and the number rises
until somewhere around 3XX.XX Ohms it switches to .3XX KOhms. As I turn it
farther the number rises until it gets to about 32X.XX when it switches to
..32X MOhms.

I have looked all through the Machinery's Handbook, and a few Machinist
books, but they all deal with mechanical things, though they do concede
there is such a thing as electricity and it comes out of a wire. Stepper
motors are used for feed on lathes and mills. I am just trying to understand
how they are controls and work. I did a google for Ohms, and found all kinds
of things, but nothing explained the relationship between Ohms/KOhms/MOhms.

Red, Sep 3, 2003

In article <WLs5b.2\$>,
Red <> wrote:

> I know Ohms is resistance. What I am trying to figure out is the
> relationship between an Ohm, a KOhm and a MOhm at the same Wattage.

The relationship you ask for is an international standard and is
much simpler that the relationship between quaint units like inches,
feet, yards, and miles.

Surf to Google and type in the following search strings:

1 kiloohm in ohm
1 megaohm in ohm

> If I check resistance of a 1 MOhm Linear-Taper Potentiometer (500VDC, 0.5W)
> with my DMM It starts out with a reading of 01.5 Ohms, and the number rises
> until somewhere around 3XX.XX Ohms it switches to .3XX KOhms. As I turn it
> farther the number rises until it gets to about 32X.XX when it switches to
> .32X MOhms.

Isn't that clue so large you can't avoid it?

< http://physics.nist.gov/cuu/Units/prefixes.html >
< http://physics.nist.gov/cuu/Units/binary.html >

--

3. ### TomGuest

334,000 ohms = 334K ohms = .334M ohms
To keep your meter from jumping, check to see if you have a button named
"range hold".

"Red" <> wrote in message
news:WLs5b.2\$...
> I know Ohms is resistance. What I am trying to figure out is the
> relationship between an Ohm, a KOhm and a MOhm at the same Wattage.
>
> How many of one does it take to make one of the others?
>
> Is 334KOhms the same as .334MOhms at the same wattage? If so then how many
> Ohms is that?
>
> If I check resistance of a 1 MOhm Linear-Taper Potentiometer (500VDC,

0.5W)
> with my DMM It starts out with a reading of 01.5 Ohms, and the number

rises
> until somewhere around 3XX.XX Ohms it switches to .3XX KOhms. As I turn it
> farther the number rises until it gets to about 32X.XX when it switches to
> .32X MOhms.
>
> I have looked all through the Machinery's Handbook, and a few Machinist
> books, but they all deal with mechanical things, though they do concede
> there is such a thing as electricity and it comes out of a wire. Stepper
> motors are used for feed on lathes and mills. I am just trying to

understand
> how they are controls and work. I did a google for Ohms, and found all

kinds
> of things, but nothing explained the relationship between

Ohms/KOhms/MOhms.
>
>

Tom, Sep 3, 2003
4. ### RedGuest

Hey guys, thanks a lot. Its just like the metric system. Yes my DMM has a
Range-Hold button. I guess what really had me going was the fact that the
multimeter kept switching ranges in the 3's. I would have expected it to go
up to the 8 or 9's brfore switching ranges. It made me think that
Ohms/KOhms/MOhms had some off the wall scale.

Thanks again.

Red, Sep 4, 2003