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$A$ battery of $emf$ $10 \;V$ and internal resistance $3\; \Omega$ is connected to a resistor. If the current in the circuit is $0.5 \;A$,what is the resistance of the resistor? What is the terminal voltage of the battery when the circuit is closed?

As shown in the figure,the power dissipated in the $6\,\Omega$ resistor is $6\,W$. The power dissipated in the $4\,\Omega$ resistor will be: (in $,W$)

In the figure shown,the capacity of the capacitor $C$ is $2\,\mu F$. The current in the $2\,\Omega$ resistor is ............... $A$.

$A$ battery of $e.m.f.$ $10 \, V$ and internal resistance $3 \, \Omega$ is connected to a resistor $R$ as shown in the figure. If the current in the circuit is $0.5 \, A$,then the resistance of the resistor $R$ will be ............. $\Omega$.

$A$ battery of $e.m.f.$ $E$ and internal resistance $r$ is connected to a variable resistor $R$ as shown in the figure. Which one of the following is true?

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