Group Abstract Group Abstract

Message Boards Message Boards

0
|
9.7K Views
|
4 Replies
|
0 Total Likes
View groups...
Share
Share this post:

How do I input this kind of word problem into Wolfram Alpha Pro?

Posted 11 years ago
POSTED BY: Arch Yeomans
4 Replies
Posted 11 years ago

Let me double check the problem just to make sure the entry I made was correct.

POSTED BY: Arch Yeomans
Posted 11 years ago

If you draw a graph of the current then I think from your description that will be a straight line with y intercept at 4 and a slope of -7.

From t=0 to t=4/7 there will be current (charge) flowing into the circuit.

To find where the cumulative charge is zero the area in the triangle above the x axis and below the line must equal the area in the triangle below the x axis and above the line. It seems that will happen when x=2*4/7.

The WolframAlpha plot of the integral shows two orange points where the charge is zero, one when t=0 and the other when t=8/7 or 1.1428 microseconds which seems to match this description.

Is there any chance there is something in the description of the problem that needs to be changed? Or did I misunderstand something?

POSTED BY: Bill Simpson
Posted 11 years ago

I think there is something missing. The result should be 0 C at t = 11 ?s.

POSTED BY: Arch Yeomans
Posted 11 years ago
POSTED BY: Bill Simpson
Reply to this discussion
Community posts can be styled and formatted using the Markdown syntax.
Reply Preview
Attachments
Remove
or Discard