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A group of N cells whose emf varies dire...

A group of N cells whose emf varies directly with the internal resistance as per the equation `E_(N)=1.5r_(N )` are connected as shown in the figure. The current in the circuit is

A

0.51 amp

B

5.1 amp

C

0.15 amp

D

1.5 amp

Text Solution

Verified by Experts

The correct Answer is:
D
`i=(sum_(0)^(n)E_(n))/(sum_(0)^(n)r_(n)) = (E_(1) +E_(2) +E_(3) +…..+ E_(n))/(r_(1) + r_() + r_(3) + …. _+ r_(n))`
`= (1.5 r_(1) + 1.5 r_(2) + 1.5 r_(3) + …. + 1.5 r_(n))/(r_(1) + r_(2) + r_(3) ……. + r_(n))`
`i=1.5 A`
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