Question

please ans ...................​

Answer 1

Field in x direction: 200cos45= 200/√2

Field in y direction: 200sin45=200/√2

Potential at P:

V=-El=-200×1/√2

Potential at point Q:

V=-El=-200×2/√2=-400/√2

Difference=Vp-Vq= (-200+400)/√2

= 200/√2