Home » Ask Physics » Problem on combination of resistances

Problem on combination of resistances

 

Find the potential difference between A and B.JpegAnswer.

As you can see from the diagram, AD and AC are in series. Similarly, BD and BC are in series. In effect, the two series combinations are in parallel. The effective resistance of each branch (2 + 3 =5, and 3+2 =5) is 5 ohm each.  Since the resistance of each branch from D to C is 5 ohm, the current divides equally among the branches. Thus the current in each is 2.5 A.

The potential difference across, DA = 2.5 x 2 = 5 V

The potential difference across, DB = 3 x 2 = 6 V

The potential difference between A & B = 6-5 = 1 V

 

 

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Hits so far @ AskPhysics

  • 2,274,296 hits

You may also be interested in

Subscribe to AskPhysics via Email

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

Join 4,339 other subscribers

August 2021
M T W T F S S
 1
2345678
9101112131415
16171819202122
23242526272829
3031  

Learn Self Defence Techniques online

%d bloggers like this: