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 resistance of the resistor ? What is the terminal voltage of the battery when the circuit is closed ?

Question

$\begin{array}{1 1} 8.5\Omega \\ 7.2\;\Omega \\ 8.3\;\Omega \\ 2.3\;\Omega \end{array} $