AIIMS2004PhysicsCurrent Electricity
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 arrangement is suggestively shown below. Each electroplaques has an emf of 0.15 ~V and internal resistance of 0.25 . The water surrounding the eel completes a circuit between the head and it
Options
- A1.5 ~A
- B3.0 ~A
- C15 ~A
- D30 ~A .
Correct answer
A. 1.5 ~A
Step-by-step solution
In each row all the 5000 electroplaques are connected in series. Therefore, equivalent emf =0.15 5000=750 ~V . Equivalent resistance =0.25 5000=1250 . All 100 rows are connected in parallel. Therefore voltage =750 ~V . Equivalent resistance = 1250 100 =12.50 . Thus resultant circuit of eel becomes Current across 500 = V R = 750 500+12.50 =1.46 ~A I 1.5 ~A .