A galvonometer of resistance $50 \Omega$ is connected to a battery of 3V along with a resistance of $2950 \Omega$ in series. A full scale deflection of 30 divisions is obtained in the galvonometer. In order to reduce this deflection to 20 divisions, the resistance in series should be :

Question

$\begin {array} {1 1} (1)\;4450 \Omega & \quad (2)\;5050 \Omega \\ (3)\;5550 \Omega & \quad (4)\;6050 \Omega \end {array}$