Charge of an `alpha-` particle is `+3.2xx10^(-19)C`. What force will act on the `alpha`- particle in an electric field of intensity `"4000 N.C"^(-1)`?

Electric force on alpha-particle placed in electric Field of 20 xx 10^4 N/C is .......

Find the time taken by a particle of mass 10^-18 kg and carrying a charge 3.2 xx 10^-19 C to fall through a distance of 8 m in a uniform electric field of intensity 8 xx 10^2 N C^-1

Find the time taken by a particle of mass 10^-18 kg and carrying a charge 3.2xx10^-19C to fall through a distance of 8.0 m a uniform electric field of intensity 8xx10^2NC^-1 .

Find the time taken by a particle of mass 4xx10^-18 kg and carrying a charge 6.4xx10^-19 C to fall through a distance of 2m in a uniform electric field of intensity 4xx10^2 NC^-1 .