Problem on combination of resistances
Find the potential difference between A and B.Answer.
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
Now is the time for intense study
The farewell party is over in most of the schools. Now you have to concentrate more on your studies and perform the best in the forthcoming examinations. Have a look at what you have to study and how best you can finish the work in the available time. Learn well and perform well. Wish you all the best.
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