Question

in x-ray tube the electric field exerts a force of 3.2 × 10^21 Newton on an electron upto a distance of 0.20 m .What will be kinetic energy of the electron if its initial energy is zero.​

Answer 1

Change in KE= work done

Change in KE= work doneKE2-KE1=FS

Change in KE= work doneKE2-KE1=FSKE2=3.2×10^-21×0.2

Change in KE= work doneKE2-KE1=FSKE2=3.2×10^-21×0.2= 64×10^-23 J