Question

an electron is travelling in a region of electrostatic potential V1 passes into the region of higher potential V2 then change in kinetic energy is proportional to?
1) V1+V2
2)V2-V1
3)V2/V1

Answer 1

We know energy=V*l
N it is travelling from lower to higher
There fore potenial should be:V2-V1
So KE directyl proportional to V2-V1.