Question

the figure shows 4n cells connected in series to form a loop r is the internal resistance and E is the EMF of each cell. The polarity of last 2n cells are reversed, then terminal voltage across cell A is ​

Answer 1

Answer:

Hey mate here is your answer

Explanation:

The correct option is c

Answer 2

zero

Explanation:

4n cells in same polarity and 2n in reverse polarity

therefore can be written as n+n-n-n =0