JEE Main 2019 — Current Electricity Question with Solution
From: JEE Main 2019 (Online) 12th April Morning Slot
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 V0 is almost zero, identify the correct statement :
If V0 is almost zero, identify the correct statement :
This question includes a diagram. The text above accompanies the figure.
Choose an option
Show full solutionCorrect option: B
Correct answer
BThe emf of the battery is l.5 V and its internal resistance is 1.5
Step-by-step explanation
V = E – Ir
When V = V0 = 0 0 = E – Ir
E = r
When I = 0, V = E = 1.5 V
r = 1.5
When V = V0 = 0 0 = E – Ir
E = r
When I = 0, V = E = 1.5 V
r = 1.5
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