Electric Math Problem

theo · Post by **theo** » Tue. Feb. 24, 2009 8:23 pm

Hello All, Need alittle help on this math problem,,, What would the resistance of a vdr be when the voltage is at 0.5 kilovolts and the current is at 100 microamperes?

coal-cooker · Post by **coal-cooker** » Tue. Feb. 24, 2009 8:33 pm

5,000,000 ohms

Cap · Post by **Cap** » Tue. Feb. 24, 2009 9:02 pm

50 million ohms.
I have this much money stashed under the matters.

Poconoeagle · Post by **Poconoeagle** » Tue. Feb. 24, 2009 9:05 pm

I bet you would put up LOTS of resistance if we came to lift your matress!!!!

JB Sparks · Post by **JB Sparks** » Tue. Feb. 24, 2009 9:16 pm

50,000 ohms

Yanche · Post by **Yanche** » Tue. Feb. 24, 2009 9:37 pm

The answer is 5.0 million ohms.

For the solution the engineer's way of thinking, using scientific notation.

R = V/I

R = 0.5*10^3 / 100*10^-6

which is the same as,

R = 5*10^2 / 1*10^-4

which is the same as,

R = 5/1 times 10^2/10^-4

which is the same as,

R = 5 times 10^6

or 5 million ohms

See how easy it was using scientific notation!

Cap · Post by **Cap** » Wed. Feb. 25, 2009 8:55 am

I missed the 100 in the micro amp. I calculated the formula using 1 microamp. da!

Darn, that means there is only 5,000,000 stuffed under the mattress.

Dann757 · Post by **Dann757** » Wed. Feb. 25, 2009 9:19 pm

Everyone is doing Theo's homework for him.

WNY · Post by **WNY** » Thu. Feb. 26, 2009 10:05 am

he need to find and use the equations.

Reference this, you should be able to figure anything out.

http://o.mneina.googlepages.com/Electronics_basics.htm