Uniform electric field of 10NC-1 exist in the vertically downward direction find the increase is electric potential as one goes up through a height of 50 cm
We know,
V = -E.d [bold letters represent vector quantities]
=> V = -Ed cosθ [θ is the angle between E and d, here it is 1800]
=> V = -(10)(0.5)(-1) [50 cm = 0.5 m]
=> V = 5 V