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

 

 

Visitors So Far @ AskPhysics

  • 2,093,459 hits

Subscribe to Blog via Email

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

Join 4,003 other subscribers

askphysics@Twitter

  • Check out Mathew Abraham’s video! #TikTok > https://t.co/T50V2XAyhC
    about 3 weeks ago
%d bloggers like this: