Direct Current QA 13
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The document discusses a physics problem involving a cell with an emf of 10V connected to four resistors arranged in parallel, with a focus on determining the potential difference between two points. The final answer for the potential difference (va - vb) is found to be +5V. Additional resources for learning physics are provided at the end.
![Physics Helpline
L K Satapathy
Direct Current - 13
Cells in Parallel
1 2.5 2.5 . . . (1)C A CA CAV V R I V
(2) (1) 7.5 2.5 [5 ]A B AnsV V V
Correct option = (d)
We are required to find ( VA – VB )
In the branch CAD , Current flows from C to A
C is at a higher potential than A
3 2.5 7.5 . . . (2)C B CB CBV V R I V
In the branch CBD , Current flows from C to B
C is at a higher potential than B
1 3
3 1
A
B
C D
10V](https://image.slidesharecdn.com/directcurrent13-160614065647/85/Direct-Current-QA-13-3-320.jpg)
Direct Current QA 13
- 1. Physics Helpline L K Satapathy Direct Current - 13 Distribution of Current 1 3 3 1 A B 10V
- 2. Physics Helpline L K Satapathy Direct Current - 13 Cells in Parallel Answer : Question : A cell of emf 10 V and negligible internal resistance is connected to four resistors as shown in the figure. Then the potential difference ( VA – VB ) is (a) – 2 V (b) + 2 V (c) – 5 V (d) + 5 V 1 3 3 1 A B 10V 1 3 3 1 A B C D 10V Resistance of branch CAD = 1 + 3 = 4 Resistance of branch CBD = 3 + 1 = 4 Circuit resistance = 4 and 4 in parallel = 2 Also , Circuit voltage = 10V Circuit current I = 5 A Current is equally shared by the two branches 2.5CAD CBDI I A 4 4 10V
- 3. Physics Helpline L K Satapathy Direct Current - 13 Cells in Parallel 1 2.5 2.5 . . . (1)C A CA CAV V R I V (2) (1) 7.5 2.5 [5 ]A B AnsV V V Correct option = (d) We are required to find ( VA – VB ) In the branch CAD , Current flows from C to A C is at a higher potential than A 3 2.5 7.5 . . . (2)C B CB CBV V R I V In the branch CBD , Current flows from C to B C is at a higher potential than B 1 3 3 1 A B C D 10V
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