Ramesh performed an experiment to determine an unknown resistance R using the circuit shown in…
Physics20262 marksShort answer
Ramesh performed an experiment to determine an unknown resistance R using the circuit shown in Figure 6 below. X is a resistance box and PQ is a 100cm potentiometer wire. He closed the key and inserted $X = 1\Omega, 2\Omega \dots$ and recorded the null point ($l$) corresponding to different values of X. (Application)
Figure 6
(a)
Identify the principle involved in calculating R.
(b)
Write down a relation required to calculate the resistance R in terms of X and ($l$).
