# TWO RESISTORS IN PARALLEL

Discussion in 'Homework Help' started by omerysmi, Jan 28, 2015.

1. ### omerysmi Thread Starter Member

Oct 10, 2014
44
0
I have to find the total resistance in this circuit:

2. ### ericgibbs AAC Fanatic!

Jan 29, 2010
2,589
389
hi,
What do you think it is.??
E

Feb 17, 2009
3,990
1,115

4. ### MrChips Moderator

Oct 2, 2009
12,624
3,451
Careful - this is a trick question.

5. ### omerysmi Thread Starter Member

Oct 10, 2014
44
0
I think it is zero

6. ### Jony130 AAC Fanatic!

Feb 17, 2009
3,990
1,115
Find Rt for this values R1 = 1000Ω and R2=0.1Ω
Also do you understand what infinity resistance means?

7. ### omerysmi Thread Starter Member

Oct 10, 2014
44
0
So what is the answer?

8. ### Jony130 AAC Fanatic!

Feb 17, 2009
3,990
1,115
Rt = 1/(1/R1 + 1/R2) = (R1*R2)/(R1 + R2) = (1000Ω * 0.1Ω)/(1000Ω + 0.1Ω) = 0.0999Ω

So for your example the answer will be ?

Oct 10, 2014
44
0
1k

10. ### Jony130 AAC Fanatic!

Feb 17, 2009
3,990
1,115
Are you sure ??

11. ### omerysmi Thread Starter Member

Oct 10, 2014
44
0
the 1k is like the 0.1ohm in your example so it should be 1k

12. ### MrChips Moderator

Oct 2, 2009
12,624
3,451
The question asks "what is the total resistance in the circuit?"

not "what is the equivalent resistance in the circuit?"

13. ### Jony130 AAC Fanatic!

Feb 17, 2009
3,990
1,115
Yep, I just checking you.
I do not see any difference between total resistance and equivalent resistance. They are not the same?