# 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 graph is obtained :If $V_{0}$ is almost zero, identify the correct statement : Option 1) The potential difference across the battery is $1.5V$ when it sends a current of $1000mA$ Option 2) The emf of the battery is $1.5V$ and the value of R is $1.5\Omega$ Option 3) The emf of the battery is $1.5V$ and its internal resistance is $1.5\Omega$ Option 4) The value of the resistance R is $1.5\Omega$

Answers (1)

When $I$ is zero in the graph, $V=1.5V$ which is EMF of the will

$E=1.5V$

Also when $V=V_{0}=zero$, then $E=ir$

$\Rightarrow 1.5=(1000mA)r$

$\Rightarrow r=1.5\Omega$

Option 1)

The potential difference across the battery is $1.5V$ when it sends a current of $1000mA$

Option 2)

The emf of the battery is $1.5V$ and the value of R is $1.5\Omega$

Option 3)

The emf of the battery is $1.5V$ and its internal resistance is $1.5\Omega$

Option 4)

The value of the resistance R is $1.5\Omega$

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