To verify Ohm's law, a student connects the voltmeter across the battery as, shown in the figure. Th

Question

To verify Ohm's law, a student connects the voltmeter across the battery as, shown in the figure. The measured voltage is plotted as a function of the current, and the following graph is obtained.\ If $V_{0}$ is almost zero, identify the correct statement\

Professor PC Thomas Classes · Answer

(a) : $V$ is the potential difference across battery loaded with some resistance.\ So $E-r I=V$\ When $I=0, V=1.5$ (given in the graph) Putting these values in the equation (i), $E=1.5 \mathrm{~V}$\ When $I=1000 \mathrm{~mA}=1 \mathrm{~A} ; V=0$\ Putting these values in the equation (i),\ $E-r 	imes 1=0 \Rightarrow E=r \Rightarrow 1.5 \Omega=r$\