(C) When a battery is being charged,the terminal voltage $V$ is given by the formula: $V = E + Ir$,where $E$ is the $EMF$ of the battery,$I$ is the ch

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(C) When a battery is being charged,the terminal voltage $V$ is given by the formula: $V = E + Ir$,where $E$ is the $EMF$ of the battery,$I$ is the charging current,and $r$ is the internal resistance.Given:Terminal voltage $V = 12.5 \text{ V}$Charging current $I = 0.5 \text{ A}$Internal resistance $r = 1 \ \Omega$Substituting the values into the equation:$12.5 = E + (0.5 \times 1)$$12.5 = E + 0.5$$E = 12.5 - 0.5$$E = 12 \text{ V}$Therefore,the $EMF$ of the storage battery is $12 \text{ V}$.

Class 12 Physics Current Electricity Electric Cells and Combination of cells in Series and Parallel

Medium

$A$ storage battery is connected to a charger for charging with a voltage of $12.5 \text{ V}$. The internal resistance of the storage battery is $1 \ \Omega$. When the charging current is $0.5 \text{ A}$,the $EMF$ of the storage battery is: ............... $\text{volts}$

A
$13$
B
$12.5$
C
$12$
D
$11.5$

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Class 12 Questions

Class 12

Physics Questions

Chapter

Current Electricity

Subtopic

Electric Cells and Combination of cells in Series and Parallel

The current provided by a battery is maximum when:

Easy

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Two identical cells send the same current in $2\,\Omega$ resistance,whether connected in series or in parallel. The internal resistance of the cell should be ............... $\Omega$.

Medium

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The potential difference in open circuit for a cell is $2.2\, V$. When a $4\, \Omega$ resistor is connected between its two electrodes,the potential difference becomes $2\, V$. The internal resistance of the cell will be .............. $\Omega$.

Medium

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Two cells,each of $e.m.f. \ E$ and internal resistance $r$,are connected in parallel across an external resistor $R$. If the power delivered to the resistor $R$ is maximum,then:

Difficult

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In the given circuit,if $V_{AB} = 4\ V$,then the value of resistance $X$ in ohms will be:

Medium

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$A$ storage battery is connected to a charger for charging with a voltage of $12.5 \text{ V}$. The internal resistance of the storage battery is $1 \ \Omega$. When the charging current is $0.5 \text{ A}$,the $EMF$ of the storage battery is: ............... $\text{volts}$

Similar Questions

The current provided by a battery is maximum when:

Two identical cells send the same current in $2\,\Omega$ resistance,whether connected in series or in parallel. The internal resistance of the cell should be ............... $\Omega$.

The potential difference in open circuit for a cell is $2.2\, V$. When a $4\, \Omega$ resistor is connected between its two electrodes,the potential difference becomes $2\, V$. The internal resistance of the cell will be .............. $\Omega$.

Two cells,each of $e.m.f. \ E$ and internal resistance $r$,are connected in parallel across an external resistor $R$. If the power delivered to the resistor $R$ is maximum,then:

In the given circuit,if $V_{AB} = 4\ V$,then the value of resistance $X$ in ohms will be:

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