Eels are able to generate current with biological cells called electro[laques.The electroplaques in an eel arranged in 100 rows,each row stratching horizontally along the body of the fish stratching horizontally along the body of the fish conaining 5000 electroplaques.The arrangement is suggestively shown below.Each electroplaques has an emf of 0.15 and internal resistance of 0.25`omega` The water surrounding the eel completes a circuit between the head and its tail.If rhe water surrounding it has a resistance of 500`omega`,The current an eel can produce in water is about

Answer

(i) `0.66` (ii) `4 m`

Explanation

For first collision with plate A, final velocity of ball `v_(1) = ev_(0) = e sqrt(2gh_(0))` ….(i)
For second collision `mv = 4mv' rArr v' = (v)/(4)`
`rArr e sqrt((2gh_(0))/(4)) = sqrt(2gh_(2)) rArr e = (2)/(3)`
Height attained after first collision
`:. h_(1) = e^(2)h_(0) = (2)/(3) xx (2)/(3) xx 9 = 4m`