Effect on Voltage by Adding Resistance on Analog Output

Risistance training will make it stronger.

A typical analog output signal can handle up to about 500 ohms...

General explanative blurb...

"Conductive objects are always full of movable electric charges, and the overall motion of these charges is called an 'electric current.' Voltage can cause electric currents because a difference in voltage acts like a difference in pressure which pushes the conductors' own charges along. A conductor offers a certain amount of electrical resistance or "friction," and the friction against the flowing charges heats up the resistive object. The flow-rate of the moving charges is measured in Amperes. The transfer of electrical energy (as well as the rate of heat output) is measured in Watts. The electrical resistance is measured in Ohms. "

http://amasci.com/elect/vwatt1.html

http://www.control.com/thread/1336687354

I am having a synchronising controller. On its voltage regulation terminal I am getting 10V DC while my requirement for voltage regulation of alternator is 3 V. As per the drawing shown I added 180Ω resistance in parallel of terminal & the voltage was reduced. While I have read voltage drops in series connections

Looks like you're well on your way to constructing a heater, possibly with its own built in flames.

Try this instead

http://en.wikipedia.org/wiki/Voltage_divider

Please draw a circuit to show us what you mean.

Some questions -

1. Where are you measuring the voltage?

2. What is the output impedance of the analog output?

3. What is the input impedance of the circuit it is driving?

4. What value of resistance are you planning on inserting?

5. What is the voltage without having this planned resistance inserted?

In other words, your question is vague and you need to provide more information.