A uniform electric field of \( 20\,\mathrm{V\,m^{-1}} \) exists in the vertically downward direction. What will be increase in the electric potential as one goes up through a height of 60 cm?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 12 V
The electric potential decreases along the direction of the field. The field points down, so the potential increases going up, and in a uniform field the change is \( \Delta V = Ed \).
\( d = 60\,\mathrm{cm} = 0.60\,\mathrm{m} \)
\( \Delta V = (20\,\mathrm{V\,m^{-1}})(0.60\,\mathrm{m}) = 12\,\mathrm{V} \)