Question

what is the total emf when 3 cellseach of voltages 1v,1.5v,2v are connected in a)series and b)paralell​

Answer 1

Answer:

Emf=2V

r=?

R=5Ω

terminal voltage=5V

Let internal resistance be r ohm

the effective resistance of each three cells in parallel, r=  

3

r

​  

 

total resistance =  

3

r

​  

+R

V=emf×  

r

R

​  

+R

terminal voltage V=emf×  

(  

3

r

​  

)

R

​  

+R

1.5=2×  

(  

3

r

​  

)

5

​  

+5

r=5Ω

Explanation:

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