A  moving  coil  galvanometer  has  50  turns  and  each  turn  has  an  area  $2\times {10}^{-4}{m}^2$.  The  magnetic  field produced by the magnet inside the galvanometer is 0.02 T. The torsional constant of the suspension wire is  ${10}^{-4}Nmra{d}^{-1}$ . When a current flows through the galvanometer, a full scale deflection occurs if the coil rotates  by  0.2  rad.  The  resistance  of  the  coil  of  the  galvanometer  is  $50\Omega$ . This  galvanometer  is  to  be converted into an ammeter capable of measuring current in the range 0-1.0 A. For this purpose, a shunt resistance  is  to  be  added  in  parallel  to  the  galvanometer.  The  value  of  this  shunt  resistance,  in  ohms,  is  $\frac{50}{x}\Omega$ , then  $x$  is _____