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 V0 is almost zero, identify the correct statement :
a) The emf of the battery is 1.5 V and its internal resistance is 1.5
b) The emf of the battery is 1.5 V and the value of R is 1.5
c) The value of the resistance R is 1.5
d) The potential difference across the battery is 1.5 V when it sends a current of 1000 mA
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 V0 is almost zero, identify the correct statement :
a) The emf of the battery is 1.5 V and its internal resistance is 1.5
b) The emf of the battery is 1.5 V and the value of R is 1.5
c) The value of the resistance R is 1.5
d) The potential difference across the battery is 1.5 V when it sends a current of 1000 mA
for R = , V = E = 1.5 V
for R = 0, I = E/r = 1
r = 1.5