A uniform resistance wire $XY$, with a length of $100\,\text{cm}$, is placed in series with a cell $L$. A further cell $M$ is put in series with resistors having resistances $5.00\,\Omega$, $10.0\,\Omega$ and $15.0\,\Omega$. The potential difference (p.d.) between $P$ and $Q$ is then balanced by $12.5\,\text{cm}$ of the resistance wire, causing the ammeter to show zero. After that, the p.d. across the remaining resistors is balanced using other lengths of the resistance wire. Which balanced lengths of resistance wire correspond to the connection points shown in the table?
Physics 9702 · AS & A Level · Practical circuits