Combination of Cells: Parallel Connection

In summary, the two cells are in parallel with the same polarity and without any external load. If their internal resistances are r1=2ohm and r2= 3ohm respectively, then terminal PD across any cell is less than 5V.
  • #1
Abhishekdas
208
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Combination of cells...

Homework Statement


Two cells of emf E1=6V and E2= 5V are joined in parallel with same polarity on same side, without any external load. If their internal resistances are r1=2ohm and r2= 3ohm respectively , then which of the following is true?
1. terminal PD across any cell is less than 5V
2. Terminal PD across any cell is 5.6 V
3. Current through the cell is .2 A
4. current throgh the cells is zero is E1= E2




Homework Equations





The Attempt at a Solution


I got point 2 correct by using the formula for grouping of cells and if 2 is correct one is not...I am ok till that but i am not getting how to do the other parts...(3 nad 4)...what is meant by having no external load and what 'current throgh the cells' are they talking about current through each of them or current through the entire battery(the equivalent cell)?
 
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  • #2


If there is no load the two cells make a single closed loop and the same current flows through each of them as no current can flow anywhere else.
It is useful if you draw the set-up.

ehild
 
  • #3


Hi ehild...
There is no diagram given for this question...Now if there is no load(ie as you say same current passes through each cell) then how come they are in parallel...I mean parallel wrt what? If there is no load then they apparently seem to be in series...
 
  • #4


You should draw a circuit diagram, like the attached one. There are two terminals (A,B) of the "new battery" which can be connected into a circuit or to a voltmeter. With respect to these terminals, A and B, the cells are connected in parallel. With respect to the loop, they are in series.

ehild
 

Attachments

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  • #5


Ok...got it...thats how they are parallel...and got the right answers too...thanks...
 

FAQ: Combination of Cells: Parallel Connection

What is a combination of cells?

A combination of cells refers to the process of joining two or more cells together to create a larger, more complex structure. This can occur naturally in living organisms or can be done artificially in a laboratory setting.

Why is the combination of cells important in scientific research?

The combination of cells is important in scientific research because it allows scientists to create new and more complex structures for studying and understanding biological processes. It also allows for the development of new technologies and treatments for diseases.

What is the difference between a combination of cells and a single cell?

The main difference between a combination of cells and a single cell is the level of complexity. A single cell is a basic unit of life, while a combination of cells is a more complex structure made up of multiple cells working together to perform specific functions.

How are cells combined in a laboratory setting?

In a laboratory, cells can be combined through various techniques such as cell fusion, microinjection, and tissue engineering. Cell fusion involves combining two cells by fusing their membranes together, while microinjection involves injecting one cell into another. Tissue engineering involves growing cells on a scaffold to create a larger structure.

What are the ethical considerations surrounding the combination of cells?

The combination of cells raises ethical concerns, especially when it comes to human cells. This includes questions about the source of the cells, the potential for creating new life, and the use of genetic modification. It is important for scientists to follow ethical guidelines and regulations when conducting research involving the combination of cells.

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