# helping

#### ute

Joined Dec 24, 2011
1
hi
im a student in the university of technology in iraq
in the electrical engineering
i want the answer of this question
i

#### Wendy

Joined Mar 24, 2008
23,477
Since this is homework I have moved it to the appropriate forum.

Joined Dec 26, 2010
2,148
What is EWB: a circuit theorem, or perhaps a software package? Normally we would ask for some effort at a solution on your part, but perhaps tonight I will make an exception.

This could be done with an ordinary spreadsheet, writing expressions for the upper and lower parts of the potential divider:

The upper part R1 is the remaining part of the potentiometer track; R1 = (Rd-RX).

The lower part R2 is the parallel combination of RL andRX ; R2 = (RL*RX)/(RL+RX).

The potential divider expression will do the rest. If you don't know it, Google it.

#### thatoneguy

Joined Feb 19, 2009
6,359
EWB is Electronics Workbench, which has become Multisim since NI bought them.

#### crutschow

Joined Mar 14, 2008
34,844
So the OP doesn't have to calculate the values, just simulate it on EWB.

ute, do you know how to use EWB?

#### MrChips

Joined Oct 2, 2009
31,088
Please use a title that tells us what is the question that you are asking.
"Help" tells us nothing.

#### DerStrom8

Joined Feb 20, 2011
2,390
Since this is a homework assignment, we can not simply give you the answer. We need to see what you have done so far, and we can help you with it from there. We won't do all the work ourselves

Regards