Physics - Current Electricity Question with Solution | TestHub

The series combination of two batteries, both of the same emf $10\mathrm{V},$ but different internal resistance of $20\Omega$ and $5\Omega ,$ is connected to the parallel combination of two resistors $30\Omega$ and $\text{x}\Omega .$ The voltage difference across the battery of internal resistance $20\Omega$ is zero, the value of $\text{x}$ (in $\Omega )$ is____