(C) The terminal potential difference $V$ across a battery is given by $V = E - Ir$,where $E$ is the $emf$ and $r$ is the internal resistance.From the

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

(C) The terminal potential difference $V$ across a battery is given by $V = E - Ir$,where $E$ is the $emf$ and $r$ is the internal resistance.From the graph,when the current $I = 0$,the voltage $V = E = 1.5 \, V$.When the current $I = 1000 \, mA = 1 \, A$,the voltage $V = V_0 \approx 0 \, V$.Substituting these values into the equation $V = E - Ir$:$0 = 1.5 - (1 \, A) \times r$$r = 1.5 \, \Omega$.Thus,the $emf$ of the battery is $1.5 \, V$ and its internal resistance is $1.5 \, \Omega$.

Class 12 Physics Current Electricity Circuit Solving for current and Voltage

Medium

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.

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A
The potential difference across the battery is $1.5 \, V$ when it sends a current of $1000 \, mA$.
B
The $emf$ of the battery is $1.5 \, V$ and the value of $R$ is $1.5 \, \Omega$.
C
The $emf$ of the battery is $1.5 \, V$ and its internal resistance is $1.5 \, \Omega$.
D
The value of the resistance $R$ is $1.5 \, \Omega$.

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Current Electricity

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Circuit Solving for current and Voltage

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In the circuit shown in the figure,the current flowing in the $2\,\Omega$ resistance is ............... $A$.

Medium

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In a copper voltameter,the mass deposited in $30\, \text{s}$ is $m\, \text{g}$. If the current-time graph is as shown in the figure,the Electrochemical Equivalent $(ECE)$ of copper is:

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Consider the circuits shown in the figure. Both the circuits draw the same current from the battery,but the current through $R$ in the second circuit is $\frac{1}{10}$th of the current through $R$ in the first circuit. If $R = 11 \ \Omega$,the value of $R_1$ is ................ $\Omega$.

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$A$ dry cell has an $e.m.f.$ of $1.5\, V$ and an internal resistance of $0.05\,\Omega$. The maximum current obtainable from this cell for a very short time interval is ................... $A$.

Easy

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In the adjoining figure,the $emf$ of the cell is $2 \, V$ and its internal resistance is negligible. The resistance of the voltmeter is $80 \, \Omega$. The reading of the voltmeter will be ................ $volt$.

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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.

Similar Questions

In the circuit shown in the figure,the current flowing in the $2\,\Omega$ resistance is ............... $A$.

In a copper voltameter,the mass deposited in $30\, \text{s}$ is $m\, \text{g}$. If the current-time graph is as shown in the figure,the Electrochemical Equivalent $(ECE)$ of copper is:

Consider the circuits shown in the figure. Both the circuits draw the same current from the battery,but the current through $R$ in the second circuit is $\frac{1}{10}$th of the current through $R$ in the first circuit. If $R = 11 \ \Omega$,the value of $R_1$ is ................ $\Omega$.

$A$ dry cell has an $e.m.f.$ of $1.5\, V$ and an internal resistance of $0.05\,\Omega$. The maximum current obtainable from this cell for a very short time interval is ................... $A$.

In the adjoining figure,the $emf$ of the cell is $2 \, V$ and its internal resistance is negligible. The resistance of the voltmeter is $80 \, \Omega$. The reading of the voltmeter will be ................ $volt$.

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