Eels are able to generate current with biological cells called electroplaques. The electroplaques in an eel are arranged in 100 rows, each row stretching horizontally along the body of the fish containing 5000 electroplaques. The arrangment is suggestively shown below. Each electroplaques has an emf of `0.15 V` and internal resistance of `0.25 Omega`
The water surrounding theeel completes a cricuit be ween the head and its tail. If the water surrounding it has a resistance of `500 Omega`, the current an eel can produce in water is about

Options

A. 1.5 A
B. 3.0A
C. 15A
D. 30A

Answer

A

Explanation

In each row all the 5000 electroplaques are connected in series.
Therefore,equivalent emf`=0.15xx5000=750 V`.
Equivalent resitance`=0.25xx5000=1250 omega`.
All 100 rows are connected in parallel.
Therefore Voltage=750 V.
Equivalent resitance`=(1250)/(100)=12.50 omega`.
"Thus resultant circuit of feel becomes"
Current across 500`omega=(V)/(R)=(750)/(500+12.50)=1.46A`.