A charged particle having drift velocity of 7.5× 10^-4 m/s in an electric field of 3×10^-10V/m, has mobility in m^2 V^-1 s^-1

 [NEET-2020 ] a. 2.25×10^15      b. 25×10^6      c. 2.5×19^-6        d. 2.25 ×10^-15

A missile is fired for a maximum range with an initial velocity of 20 m/s, the range of a missile is

[NEET-2011] a. 40m      b. 50m     c. 60m    d. 20m    The range of a projectile can be given as