Question

How do you solve this electric potential physics question

3) In the figure below the electric potential at point A is -zoov. What is the potential at point B which is at a distance of 5 cm to the right of A? - E= 1200 m AV A = V - V B - A - Eld coso B * -- A00 - - - - - - - - -

Answer 1

Solution :

Given :

E = 1200 V/m

d = 5 cm = 0.05 m

V_A = - 300 V

$\theta$ = 30^o

Since: V_B -V_A = - E d cos$\theta$

Thus : V_B = V_A - E d cos$\theta$ = ( -300 V ) - (1200 V/m)(0.05 m) cos(30) = - 351.96 V