`n` conducting wires of same dimensions but having resistivities 1,2,3,….n are connected is series. The equivalent resistivity of the combination isA. `(n(n+1))/(2)`B. `(n+1)/(2)`C. `(n+1)/(2n)`D. `(2n)/(n+1)`

`n` conducting wires of same dimensions but having resistivities 1,2,3

1.	`n` conducting wires of same dimensions but having resistivities 1,2,3,….n are connected is series. The equivalent resistivity of the combination isA. `(n(n+1))/(2)`B. `(n+1)/(2)`C. `(n+1)/(2n)`D. `(2n)/(n+1)`
Answer» Correct Answer - B `R=R_(1)+R_(2)+…R_(n)` `(rho(nl))/(A)=l(l)/(A)+2(l)/(A)+….+n(l)/(A)` `rhon=1+2+3+…+n` `rhon=(n(n+1))/(2)=(n+1)/(2)`

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`n` conducting wires of same dimensions but having resistivities 1,2,3,….n are connected is series. The equivalent resistivity of the combination isA. `(n(n+1))/(2)`B. `(n+1)/(2)`C. `(n+1)/(2n)`D. `(2n)/(n+1)`

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