In a meter bridge experiment, the circuit diagram and the corresponding observation table are shown

Question

In a meter bridge experiment, the circuit diagram and the corresponding observation table are shown in figure. Which of the readings is inconsistent ?\

Professor PC Thomas Classes · Answer

(a) : $\because \frac{R}{X}=\frac{l}{(100-l)}$. So, $X=\frac{R(100-l)}{l}$.\ So, $X_{1}=\frac{1000 	imes(100-60)}{60}$\ $=\frac{1000 	imes 40}{60}=666.66 \Omega$\ $X_{2}=\frac{100 	imes(100-13)}{13}=\frac{100 	imes 87}{13}=669.23 \Omega$\ $X_{3}=\frac{10 	imes(100-1.5)}{1.5}=\frac{10 	imes 98.5}{1.5}=656.66 \Omega$\ $X_{4}=\frac{1 	imes(100-1)}{1}=99 \Omega$\