n equal cell having emf E and internal resistance r, are connected in circuit of a resistance R. Same current flows in circuit either they connected in series or parallel, if:A. R=nrB. `R=r/n`C. `R=n^(2)r`D. R=r

n equal cell having emf E and internal resistance r, are connected in

1.	n equal cell having emf E and internal resistance r, are connected in circuit of a resistance R. Same current flows in circuit either they connected in series or parallel, if:A. R=nrB. `R=r/n`C. `R=n^(2)r`D. R=r
Answer» Correct Answer - D Current when cells are connected in series `i_(s)=(nE)/(nr+R)` in parallel `i_(p)=(nE)/(r+nR)` According to question `i_(s)=i_(p)` `(nE)/(nr+R) =(nE)/(r+nR) rArr r+nR =nr+R rArr (n-1) R=r(n--1) rArr R=r`

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n equal cell having emf E and internal resistance r, are connected in circuit of a resistance R. Same current flows in circuit either they connected in series or parallel, if:A. R=nrB. `R=r/n`C. `R=n^(2)r`D. R=r

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