Equivalent resistance in this network

In summary, equivalent resistance in a network refers to the total resistance that exists between two points in a circuit. It is calculated by combining individual resistances using Ohm's Law, and can be determined using series or parallel circuit configurations. Equivalent resistance is an important concept in understanding the behavior of electrical circuits and is used to determine the total current or voltage in a network. It is also crucial in designing and troubleshooting circuits for various applications.
  • #1
Smash55
3
0
http://img571.imageshack.us/img571/3774/circuitb.png

Uploaded with ImageShack.us

For my a level homework i have to find the equivalent resistance in this circuit, i don't want anyone to do my homework i would just like to be pointed in the right direction.

We have been doing a bit about wheatstone bridges, so i think its related to that but I am having trouble working out how to start, i think its because of how its laid out.

Thanks for any help
Sam

Ps sorry for the crudely drawn image
 
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  • #2
It's not a Wheatstone Bridge.

The first step, if you are confused, is to try and redraw the circuit into something more familiar, while keeping all the series-parallel relationships the same. This is what it'll look like:
http://img37.imageshack.us/img37/4938/circuitx.th.jpg

That enough to solve it yourself?

I'll put my answer in spoiler tags. No fair peeking until you've done it yourself!
RT = 14.888... ohms
 
Last edited by a moderator:
  • #3
Smash55 said:
http://img571.imageshack.us/img571/3774/circuitb.png

Uploaded with ImageShack.us

For my a level homework i have to find the equivalent resistance in this circuit, i don't want anyone to do my homework i would just like to be pointed in the right direction.

We have been doing a bit about wheatstone bridges, so i think its related to that but I am having trouble working out how to start, i think its because of how its laid out.

Thanks for any help
Sam

Ps sorry for the crudely drawn image

Jiggy-Ninja said:
It's not a Wheatstone Bridge.

The first step, if you are confused, is to try and redraw the circuit into something more familiar, while keeping all the series-parallel relationships the same. This is what it'll look like:
http://img37.imageshack.us/img37/4938/circuitx.th.jpg

That enough to solve it yourself?

I'll put my answer in spoiler tags. No fair peeking until you've done it yourself!
RT = 14.888... ohms
I thought I should point out this Sticky at the top of this EE forum:

https://www.physicsforums.com/showthread.php?t=224442"

Regards
 
Last edited by a moderator:
  • #4
Jiggy-Ninja said:
It's not a Wheatstone Bridge.

The first step, if you are confused, is to try and redraw the circuit into something more familiar, while keeping all the series-parallel relationships the same. This is what it'll look like:
http://img37.imageshack.us/img37/4938/circuitx.th.jpg

That enough to solve it yourself?

I'll put my answer in spoiler tags. No fair peeking until you've done it yourself!
RT = 14.888... ohms

Thanks for the help, that does make it a lot easier, i did try something similar before but i the diagonal kept confusing me.
 
Last edited by a moderator:
  • #5
dlgoff said:
I thought I should point out this Sticky at the top of this EE forum:

https://www.physicsforums.com/showthread.php?t=224442"

Regards

Sorry should have read that first
 
Last edited by a moderator:

1. How do I calculate the equivalent resistance in this network?

The equivalent resistance in a network can be calculated by using Ohm's Law, which states that resistance (R) is equal to voltage (V) divided by current (I). In a series circuit, the equivalent resistance is the sum of all individual resistances, while in a parallel circuit, it is calculated using the formula 1/Req = 1/R1 + 1/R2 + ... + 1/Rn.

2. What is the purpose of finding the equivalent resistance in a network?

Calculating the equivalent resistance in a network allows us to simplify the circuit and analyze it more easily. It also helps us determine the amount of current that will flow through the circuit and the voltage drops across each component.

3. How do resistors in a series circuit affect the equivalent resistance?

In a series circuit, resistors add up to increase the equivalent resistance. This is because the current has to flow through each resistor, and each one adds more resistance to the circuit. The equivalent resistance in a series circuit is always greater than any individual resistor.

4. How do resistors in a parallel circuit affect the equivalent resistance?

In a parallel circuit, resistors decrease the equivalent resistance. This is because there are multiple paths for the current to flow, and each resistor offers a different path of resistance. The equivalent resistance in a parallel circuit is always less than any individual resistor.

5. Can the equivalent resistance in a network be negative?

No, the equivalent resistance in a network can never be negative. Resistance is a physical property that represents the opposition of a material to the flow of electric current. Therefore, it can only have positive values.

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